| 2024-02-26 19:58 | Theme > Female Idol - Maximum number of turnins changed from "Once per difficulty" to "Twice per difficulty". |
| 2024-01-01 22:04 | Type > Movie-per-Day - Minimum total duration (minutes) changed from "15" to "None". |
| 2024-01-01 00:51 | Year > Aired 2023 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2023-10-26 18:15 | Type > OVA-per-Day - Minimum total duration (minutes) changed from "15" to "None". |
| 2023-10-23 05:06 | Genre > Space - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2023-10-22 06:43 | Genre > Josei - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2023-10-22 06:43 | Genre > Shoujo Ai - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2023-10-22 06:43 | Genre > Shounen Ai - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2023-10-05 04:54 | Type > Music-per-Day - Previous list status changed from "No previously seen allowed" to "No previously started allowed". |
| 2023-08-29 05:36 | Genre > Police Cars - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2023-08-21 11:07 | Genre > Martial Arts - Maximum number of turnins changed from "Once per difficulty" to "Twice per difficulty". |
| 2023-07-30 05:27 | Creator > Seiyuu Chain - Maximum number of turnins changed from "Once per difficulty" to "Twice per difficulty". |
| 2023-07-30 05:27 | Creator > Staff Chain - Maximum number of turnins changed from "Once per difficulty" to "Twice per difficulty". |
| 2023-07-20 19:25 | Year > Aired 2011 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2023-07-20 19:24 | Year > Aired 2012 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2023-07-20 19:24 | Year > Aired 2013 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2023-07-20 19:24 | Year > Aired 2014 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2023-07-20 19:24 | Year > Aired 2015 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2023-07-20 19:24 | Year > Aired 2016 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2023-07-20 19:24 | Year > Aired 2017 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2023-07-20 19:24 | Year > Aired 2018 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2023-07-20 19:23 | Year > Aired 2019 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2023-07-20 19:23 | Year > Aired 2020 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2023-07-20 19:23 | Year > Aired 2021 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2023-07-20 19:23 | Year > Aired 2022 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2023-07-16 17:16 | Statistics > 100 Episodes - Maximum number of turnins changed from "Twice per difficulty" to "Once per difficulty". |
| 2023-01-21 20:18 | Theme > Iyashikei - Maximum number of turnins changed from "Once per difficulty" to "Twice per difficulty". |
| 2023-01-21 16:53 | Theme > Korean and Chinese Anime - Maximum number of turnins changed from "Once per difficulty" to "Twice per difficulty". |
| 2023-01-21 14:38 | Type > Genre-Music - Maximum number of turnins changed from "Once per difficulty" to "Twice per difficulty". |
| 2023-01-19 13:23 | Statistics > Multi Genre - Previous list status changed from "No previously started allowed" to "No previously seen allowed". |
| 2023-01-19 13:23 | Statistics > Multi Genre - Anime type restriction changed from "Any type except Music" to "None". |
| 2022-07-12 05:07 | Type > Genre-Special - Maximum number of turnins changed from "Once per difficulty" to "Twice per difficulty". |
| 2022-04-12 19:24 | Year > Lustrum - Ongoing anime changed from "Allowed" to "Not Allowed". |
| 2022-03-30 09:06 | Limited > Cheeky Santa 2021 - Maximum number of turnins changed from "Once across all difficulties" to "Once per difficulty". |
| 2022-03-04 13:35 | Creator > Animeism - Maximum number of turnins changed from "Once across all difficulties" to "Once per difficulty". |
| 2022-03-03 09:31 | Limited > Halloween Bingo 2019 - Previous list status changed from "No previously seen allowed" to "Restricted challenge period, no previously seen allowed". |
| 2022-03-03 09:31 | Limited > Highlighted - Nov 2019 - Previous list status changed from "No previously seen allowed" to "Restricted challenge period, no previously seen allowed". |
| 2022-03-03 09:30 | Limited > Highlighted - Feb 2020 - Previous list status changed from "No previously seen allowed" to "Restricted challenge period, no previously seen allowed". |
| 2022-03-03 09:30 | Limited > Easter Bean Hunt - Apr 2020 - Previous list status changed from "No previously seen allowed" to "Restricted challenge period, no previously seen allowed". |
| 2022-03-03 09:29 | Limited > Highlighted - Aug 2020 - Previous list status changed from "No previously seen allowed" to "Restricted challenge period, no previously seen allowed". |
| 2022-03-03 09:28 | Limited > 2021 Adventure of Sumno & Winsu - Previous list status changed from "Restricted challenge period, no previously started allowed" to "Restricted challenge period, no previously seen allowed". |
| 2022-03-03 09:27 | Limited > Tricky Quiz 2021 - Previous list status changed from "No previously seen allowed" to "Restricted challenge period, no previously seen allowed". |
| 2022-03-03 09:26 | Limited > Cheeky Santa 2021 - Previous list status changed from "Restricted challenge period, no previously started allowed" to "Restricted challenge period, no previously seen allowed". |
| 2022-03-03 09:23 | Limited > Sports Festival 2022 - Previous list status changed from "Restricted challenge period, no previously started allowed" to "Restricted challenge period, no previously seen allowed". |
| 2021-11-28 10:53 | Characters > Character Tags - Previous list status changed from "No previously started allowed" to "No previously seen allowed". |
| 2021-11-28 10:53 | Miscellaneous > Anime Tags - Previous list status changed from "No previously started allowed" to "No previously seen allowed". |
| 2021-09-17 15:23 | Theme > GAR - Previous list status changed from "Previously seen allowed only if no other choice" to "No previously seen allowed". Ongoing anime changed from "Allowed if at least 10+ episodes aired" to "Not Allowed". |
| 2021-07-03 07:48 | Limited > 2021 Adventure of Sumno & Winsu - Maximum number of turnins changed from "Once across all difficulties" to "Once per difficulty". |
| 2021-06-22 19:18 | Type > Genre-OVA - Previous list status changed from "No previously started allowed" to "No previously seen allowed". |
| 2021-05-07 09:30 | Monthly > May 2021 - Maximum number of turnins changed from "Once across all difficulties" to "Once per difficulty". |
| 2021-03-31 20:58 | Type > TV Matching - Previous list status changed from "No previously seen allowed" to "No previously started allowed". |
| 2021-03-31 20:58 | Type > Other Matching - Previous list status changed from "No previously seen allowed" to "No previously started allowed". |
| 2021-03-31 12:26 | Type > Movie Matching - Previous list status changed from "No previously seen allowed" to "No previously started allowed". |
| 2020-12-25 22:34 | Creator > Seiyuu - Previous list status changed from "No previously started allowed" to "No previously seen allowed". |
| 2020-12-09 22:47 | Miscellaneous > Recommended - Previous list status changed from "No previously started allowed" to "No previously seen allowed". |
| 2020-12-07 08:30 | Year > OVA Timeline - Previous list status changed from "No previously seen allowed" to "No previously started allowed". |
| 2020-12-06 14:49 | Miscellaneous > 52 Weeks - Maximum number of turnins changed from "Twice per difficulty" to "Three times per difficulty". |
| 2020-11-11 23:53 | Franchise > Pokemon - Maximum number of turnins changed from "Once across all difficulties" to "Once per difficulty". |
| 2020-11-11 23:42 | Franchise > Naruto - Maximum number of turnins changed from "Once across all difficulties" to "Once per difficulty". |
| 2020-11-11 23:19 | Franchise > Type-Moon - Maximum number of turnins changed from "Once across all difficulties" to "Once per difficulty". |
| 2020-11-11 23:14 | Franchise > Precure - Maximum number of turnins changed from "Once across all difficulties" to "Once per difficulty". |
| 2020-11-11 23:07 | Franchise > Lupin III - Maximum number of turnins changed from "Once across all difficulties" to "Once per difficulty". |
| 2020-11-11 22:42 | Franchise > Dragon Ball - Maximum number of turnins changed from "Once across all difficulties" to "Once per difficulty". |
| 2020-11-11 22:28 | Franchise > Gundam Universe - Maximum number of turnins changed from "Once across all difficulties" to "Once per difficulty". |
| 2020-11-11 22:16 | Franchise > Digimon - Maximum number of turnins changed from "Once across all difficulties" to "Once per difficulty". |
| 2020-11-08 09:55 | Characters > Character Tag Chain - Maximum number of turnins changed from "Once per difficulty" to "Twice per difficulty". |
| 2020-11-08 09:55 | Miscellaneous > Anime Tag Chain - Maximum number of turnins changed from "Once per difficulty" to "Twice per difficulty". |
| 2020-11-08 09:43 | Type > Genre-Movies - Maximum number of turnins changed from "Twice per difficulty" to "Three times per difficulty". |
| 2020-11-03 07:40 | Theme > Male Idol - Ongoing anime changed from "Allowed" to "Not Allowed". |
| 2020-11-03 07:38 | Theme > Isekai - Ongoing anime changed from "Allowed" to "Not Allowed". |
| 2020-11-03 07:37 | Theme > Superhero - Ongoing anime changed from "Allowed" to "Not Allowed". |
| 2020-11-03 07:35 | Theme > Steampunk - Ongoing anime changed from "Allowed" to "Not Allowed". |
| 2020-11-03 07:10 | Studios > Toei Animation - Ongoing anime changed from "Allowed" to "Not Allowed". |
| 2020-10-31 18:22 | Year > Ultimate - Anime type restriction changed from "TV only" to "TV and ONA". |
| 2020-10-31 11:49 | Monthly > Monthly Challenge Creator - Maximum number of turnins changed from "No limitation" to "No limitation". |
| 2020-10-25 15:54 | Series Collections > Hakuouki - Previous list status changed from "No previously started allowed" to "Previously seen allowed". |
| 2020-08-30 08:02 | Limited > Highlighted - Feb 2020 - Maximum number of turnins changed from "No limitation" to "Once per difficulty". |
| 2020-08-23 07:02 | Miscellaneous > Recommended - Minimum total duration (minutes) changed from "None" to "15". |
| 2020-07-22 09:29 | Studios > Xebec - Maximum number of turnins changed from "Once across all difficulties" to "Once per difficulty". Ongoing anime changed from "Allowed" to "Not Allowed". |
| 2020-07-22 09:25 | Studios > Shaft - Maximum number of turnins changed from "Once across all difficulties" to "Once per difficulty". Ongoing anime changed from "Allowed" to "Not Allowed". |
| 2020-07-22 09:20 | Studios > P.A. Works - Maximum number of turnins changed from "Once across all difficulties" to "Once per difficulty". Ongoing anime changed from "Allowed" to "Not Allowed". |
| 2020-07-22 09:16 | Studios > Manglobe - Maximum number of turnins changed from "Once across all difficulties" to "Once per difficulty". Ongoing anime changed from "Allowed" to "Not Allowed". |
| 2020-07-22 09:05 | Studios > MAPPA - Maximum number of turnins changed from "Once across all difficulties" to "Once per difficulty". |
| 2020-07-22 08:37 | Studios > Kyoto Animation - Maximum number of turnins changed from "Once across all difficulties" to "Once per difficulty". Ongoing anime changed from "Allowed" to "Not Allowed". |
| 2020-07-22 08:08 | Studios > Gainax - Maximum number of turnins changed from "Once across all difficulties" to "Once per difficulty". Ongoing anime changed from "Allowed" to "Not Allowed". |
| 2020-07-22 08:00 | Studios > Brain's Base - Maximum number of turnins changed from "Once across all difficulties" to "Once per difficulty". |
| 2020-07-22 07:59 | Studios > Doga Kobo - Maximum number of turnins changed from "Once across all difficulties" to "Once per difficulty". Ongoing anime changed from "Allowed" to "Not Allowed". |
| 2020-07-22 07:21 | Studios > Brain's Base - Ongoing anime changed from "Allowed" to "Not Allowed". |
| 2020-07-22 07:09 | Studios > Bones - Maximum number of turnins changed from "Once across all difficulties" to "Once per difficulty". Ongoing anime changed from "Allowed" to "Not Allowed". |
| 2020-07-22 07:04 | Studios > Studio 4°C - Ongoing anime changed from "Allowed" to "Not Allowed". |
| 2020-06-25 08:55 | Genre > Fantasy - Maximum number of turnins changed from "Twice per difficulty" to "Three times per difficulty". |
| 2020-06-25 08:55 | Genre > Drama - Maximum number of turnins changed from "Twice per difficulty" to "Three times per difficulty". |
| 2020-06-25 08:55 | Genre > Adventure - Maximum number of turnins changed from "Twice per difficulty" to "Three times per difficulty". |
| 2020-06-25 08:54 | Genre > Action - Maximum number of turnins changed from "Twice per difficulty" to "Three times per difficulty". |
| 2020-06-25 08:54 | Genre > Sci-Fi - Maximum number of turnins changed from "Twice per difficulty" to "Three times per difficulty". |
| 2020-06-25 08:54 | Genre > Slice of Life - Maximum number of turnins changed from "Twice per difficulty" to "Three times per difficulty". |
| 2020-06-25 08:54 | Genre > Romance - Maximum number of turnins changed from "Twice per difficulty" to "Three times per difficulty". |
| 2020-05-30 17:00 | Statistics > Demographics - Maximum number of turnins changed from "Twice per difficulty" to "Three times per difficulty". |
| 2020-02-12 06:53 | Creator > Go Nagai - Maximum number of turnins changed from "Once across all difficulties" to "Once per difficulty". |
| 2020-02-12 06:50 | Creator > Leijiverse - Maximum number of turnins changed from "Once across all difficulties" to "Once per difficulty". |
| 2020-02-12 06:14 | Scavenger Hunt > Scavenger Hunt #28 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2020-02-12 06:14 | Scavenger Hunt > Scavenger Hunt #27 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2020-02-12 06:14 | Scavenger Hunt > Scavenger Hunt #26 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2020-02-12 06:14 | Scavenger Hunt > Scavenger Hunt #25 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2020-02-12 06:14 | Scavenger Hunt > Scavenger Hunt #24 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2020-02-12 06:14 | Scavenger Hunt > Scavenger Hunt #23 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2020-02-12 06:14 | Scavenger Hunt > Scavenger Hunt #22 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2020-02-12 06:14 | Scavenger Hunt > Scavenger Hunt #21 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2020-02-12 06:13 | Scavenger Hunt > Scavenger Hunt #20 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2020-02-12 06:13 | Scavenger Hunt > Scavenger Hunt #19 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2020-02-12 06:13 | Scavenger Hunt > Scavenger Hunt #18 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2020-02-12 06:13 | Scavenger Hunt > Scavenger Hunt #17 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2020-02-12 06:13 | Scavenger Hunt > Scavenger Hunt #16 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2020-02-12 06:13 | Scavenger Hunt > Scavenger Hunt #15 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2020-02-12 06:13 | Scavenger Hunt > Scavenger Hunt #14 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2020-02-12 06:13 | Scavenger Hunt > Scavenger Hunt #13 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2020-02-12 06:13 | Scavenger Hunt > Scavenger Hunt #12 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2020-02-12 06:13 | Scavenger Hunt > Scavenger Hunt #11 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2020-02-12 06:12 | Scavenger Hunt > Scavenger Hunt #10 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2020-02-12 06:12 | Scavenger Hunt > Scavenger Hunt #09 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2020-02-12 06:12 | Scavenger Hunt > Scavenger Hunt #08 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2020-02-12 06:12 | Scavenger Hunt > Scavenger Hunt #07 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2020-02-12 06:12 | Scavenger Hunt > Scavenger Hunt #06 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2020-02-12 06:12 | Scavenger Hunt > Scavenger Hunt #05 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2020-02-12 06:12 | Scavenger Hunt > Scavenger Hunt #04 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2020-02-12 06:12 | Scavenger Hunt > Scavenger Hunt #03 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2020-02-12 06:11 | Scavenger Hunt > Scavenger Hunt #02 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2020-02-12 06:11 | Scavenger Hunt > Scavenger Hunt #01 - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2020-02-02 13:48 | Limited > Highlighted - Feb 2020 - Minimum total duration (minutes) changed from "None" to "15". |
| 2020-02-01 16:38 | Miscellaneous > 3rd Year Anniversary - Minimum total duration (minutes) changed from "12" to "15". |
| 2020-01-23 12:05 | Miscellaneous > MAL Staff Favorites - Maximum number of turnins changed from "Once across all difficulties" to "Once per difficulty". |
| 2020-01-23 11:57 | Theme > Battle Royale - Maximum number of turnins changed from "Once across all difficulties" to "Once per difficulty". Ongoing anime changed from "Allowed" to "Not Allowed". |
| 2020-01-14 19:42 | Miscellaneous > Critics and Connoisseurs - Maximum number of turnins changed from "Once across all difficulties" to "Once per difficulty". |
| 2020-01-13 23:03 | Theme > World Tour - Minimum total duration (minutes) changed from "40" to "30". |
| 2020-01-02 05:48 | Characters > Adult Character - Maximum number of turnins changed from "Once across all difficulties" to "Once per difficulty". |
| 2020-01-01 20:54 | Theme > World Tour - Anime type restriction changed from "TV only" to "None". Minimum total duration (minutes) changed from "None" to "40". |
| 2019-12-27 08:16 | Miscellaneous > Randomized - Ongoing anime changed from "Allowed" to "Not Allowed". |
| 2019-11-24 22:32 | Genre > Hentai - Previous list status changed from "Previously seen allowed only if no other choice" to "Previously seen allowed". |
| 2019-11-24 20:36 | Creator > noitaminA - Maximum number of turnins changed from "Once across all difficulties" to "Once per difficulty". |
| 2019-11-24 20:28 | Theme > Male Idol - Maximum number of turnins changed from "Once across all difficulties" to "Once per difficulty". |
| 2019-11-21 05:59 | Theme > Episodic - Anime type restriction changed from "TV and OVA with 4+ episodes only" to "None". |
| 2019-11-17 23:20 | Creator > Ghibli Founders - Maximum number of turnins changed from "Once across all difficulties" to "Once per difficulty". |
| 2019-11-17 23:14 | Theme > Gourmet - Maximum number of turnins changed from "Once across all difficulties" to "Once per difficulty". |
| 2019-11-17 14:18 | Numbers > #07 Challenge - Maximum number of turnins changed from "Three times per difficulty" to "Four times per difficulty". |
| 2019-11-11 18:33 | Theme > Superhero - Maximum number of turnins changed from "Once across all difficulties" to "Once per difficulty". Switched from one unique difficulty with list (6.25 points) to three difficulties (Easy/Medium/Hard) with thresholds (15 items: 1 point, 30 items: 2 points, 45 items: 3 points). |
| 2019-11-06 00:00 | Type > Movie-Series - Maximum number of turnins changed from "Once across all difficulties" to "Once per difficulty". Switched from one unique difficulty with list (2.75 points) to four difficulties (Easy/Medium/Hard/Conquered) with thresholds (15 items: 0.25 point, 30 items: 0.5 points, 45 items: 0.75 points, 60 items : 1 point). |
| 2019-11-06 00:00 | Statistics > Adaptations - Anime type restriction changed from "TV and OVA with 4+ episodes only" to "None". Minimum total duration (minutes) changed from "0" to "30". |
| 2019-11-05 00:00 | Statistics > Adaptations - Maximum number of turnins changed from "Twice per difficulty" to "Three times per difficulty". |
| 2019-11-05 00:00 | Creator > Studios - Maximum number of turnins changed from "Twice per difficulty" to "Three times per difficulty". |
| 2019-11-05 00:00 | Genre > Demons - Maximum number of turnins changed from "Once per difficulty" to "Twice per difficulty". |
| 2019-11-05 00:00 | Genre > Dementia - Maximum number of turnins changed from "Once per difficulty" to "Twice per difficulty". Previous list status changed from "Previously seen allowed only if no other choice" to "Previously seen allowed". Now only requires 40 items. |
| 2019-11-05 00:00 | Miscellaneous > BINGO - Maximum number of turnins changed from "Twice per difficulty" to "Three times per difficulty". Can now overlap with all Scavenger Hunts. |
| 2019-11-04 00:00 | Statistics > User Ratings - Can now overlap with Hints challenge. |
| 2019-11-04 00:00 | Miscellaneous > Hints - Can now overlap with User Ratings challenge. |
| 2019-10-27 00:00 | Type > Alpha-Seasonal Movie - Added exception for Fall, letter J. |
| 2019-10-21 00:00 | Theme > Steampunk - Maximum number of turnins changed from "Once across all difficulties" to "Twice per difficulty". |
| 2019-10-21 00:00 | Genre > Comedy - Maximum number of turnins changed from "Twice per difficulty" to "Three times per difficulty". |
| 2019-10-10 00:00 | Theme > Battle Royale - Added AniDB & Anime-Planet sources. |