| Change Cube Voice Clip Removal | fissil | Castlevania: Portrait of Ruin | Role Playing > Action RPG | NDS | S | Improvement | 1.0 | 18 Sep 2016 |
| Chance Offering | Leet Sketcher | Final Fantasy III | Role Playing | SNES | GP | Bug Fix | 1.0 | 23 Apr 2016 |
| Championship Lode Runner Full | DANGER X | Championship Lode Runner | Puzzle | NES | O | Improvement | 1.0 | 28 Oct 2016 |
| Championship Deflower | DANGER X | Championship Lode Runner | Puzzle | NES | G, T, O | Improvement | 1.0 | 10 Nov 2016 |
| Championship Bowling CNROM to MMC3 | BZK | Championship Bowling | Sports | NES | O | Improvement | 1.0 | 09 Jan 2017 |
| Championship Bowling Brunswick Edition | Prince Manic | Championship Bowling | Sports | NES | G | Improvement | 1.0 | 29 Aug 2018 |
| Challenging Lolo 2 | Sivak Drac | Adventures of Lolo 2 | Puzzle | NES | G, L, T | Complete | 1.0 | 04 Jan 2007 |
| Challenging Lolo | Sivak Drac | Adventures of Lolo | Puzzle | NES | G, L, T | Complete | 1.0 | 26 Oct 2004 |
| Challenger Sakuya | DASTARD | Challenger | Action | NES | G, T | Improvement | 1.0 | 01 Jan 2009 |
| Challenger DX | Osman Color | Challenger | Action | NES | G | Improvement | 1.0 | 02 Feb 2018 |
| Chain of Command | Leet Sketcher | Final Fantasy III | Role Playing | SNES | O | Bug Fix | 1.3 | 26 Feb 2018 |
| Centipede (USA) Highscore Save Patch | Alex-iG | Centipede (USA) | Puzzle | GB | O | Improvement | 1.0 | 17 Jan 2022 |
| Cemetery Bros. 2 | Megafield64 | Super Mario Bros. 2 | Action > Platformer | NES | G, T | Improvement | 1.0 | 13 Jan 2017 |
| Cemetery Bros. | Megafield64 | Super Mario Bros. | Action > Platformer | NES | G, T | Complete | 1.0 | 02 Oct 2014 |
| Celes + Terra | Drum Solo | Final Fantasy IV | Role Playing | SNES | G, T | Complete | 1.0 | 14 Sep 2002 |
| Catalina la Catrina | Flanagan | Super Mario Bros. | Action > Platformer | NES | G, T | Complete | 1.0 | 02 Nov 2020 |
| Castlevania：Dawn of Sorrow NIGHTMARE | ikusatatsu_ushiromiya | Castlevania: Dawn of Sorrow | Role Playing > Action RPG | NDS | L, O | Complete | 1.1 | 05 Feb 2017 |
| Castlevania：Dawn of Sorrow Magic seal simplify | ikusatatsu_ushiromiya | Castlevania: Dawn of Sorrow | Role Playing > Action RPG | NDS | O | Improvement | 1.0 | 16 Feb 2017 |
| Castlevania:Insane minuet | ikusatatsu_ushiromiya | Castlevania: Aria of Sorrow | Role Playing > Action RPG | GBA | O | Complete | 1.1 | 06 Jan 2019 |
| Castlevania: The Red Wizard | NinjAkira | Castlevania | Action > Platformer | NES | G, S, L, T, GP, O | Complete | 1.0 | 29 Aug 2018 |
