| Cadash Arcade Colors | Tor Landeel | Cadash | Role Playing > Action RPG | GEN | G | Improvement | 1.0 | 02 Mar 2018 |
| Cadillacs of Rage | Pyron | Streets of Rage 3 | Action > Beat 'Em Up | GEN | G | Improvement | 1.0 | 31 Aug 2016 |
| Can't Lose for Winning | Lenophis | Final Fantasy III | Role Playing | SNES | GP | Bug Fix | 1.1 | 19 Jan 2010 |
| Canada Cup Rosters | slapshot | NHL '94 | Sports | GEN | G, T, GP | Complete | 1.0 | 04 Feb 2009 |
| Captain America - The Winter Soldier | pacnsacdave | Power Blade 2 | Action > Platformer | NES | G, S, T, GP | Complete | 1.1 | 20 Oct 2014 |
| Captain America and the Avengers (Stage selector) | Farid | Captain America and the Avengers | Action > Beat 'Em Up | NES | GP | Improvement | 1.0 | 25 Apr 2015 |
| Captain America and the Avengers - Enhanced Colors | Pyron | Captain America and the Avengers | Action > Beat 'Em Up | GEN | G | Improvement | 1.0 | 06 Jan 2015 |
| Captain Commando: Arcade Edition | RealGaea | Captain Commando | Action > Beat 'Em Up | SNES | G, T | Improvement | 1.1 | 04 Jul 2018 |
| Captain Toad Treasure Tracker for SNES | zacmario | Super Mario World | Action > Platformer | SNES | G, S, L, T, GP, O | Complete | 1.1 | 09 Jul 2016 |
| Captain Toad Treasure Tracker for SNES II | zacmario | Super Mario World | Action > Platformer | SNES | G, L, T, GP | Complete | 1.2 | 05 May 2018 |
| Captain Tsubasa 2 - Hyper Edition | Whipon | Captain Tsubasa Vol. II: Super Striker | Sports | NES | L, GP | Improvement | 3.0 | 17 Nov 2008 |
| Captain Tsubasa 2 - Super Dream Team | Whipon | Captain Tsubasa Vol. II: Super Striker | Sports | NES | GP | Improvement | 1.0 | 06 Jun 2008 |
| Captain Tsubasa 2007 | knighTeen87 | World Soccer Winning Eleven 2002 | Sports | PSX | G, S, T | Complete | 1.0 | 16 Jul 2007 |
| Caravaggio | Leet Sketcher | Final Fantasy III | Role Playing | SNES | GP | Bug Fix | 1.3 | 06 Feb 2018 |
| Card Mode | Dev Anj | Castlevania: Circle of the Moon | Role Playing > Action RPG | GBA | GP | Improvement | 1.0 | 12 Oct 2019 |
| Carnage | Justin Anderson | Super Mario Bros. | Action > Platformer | NES | G, T | Improvement | 1.0 | 24 Jul 2000 |
| Carnage 2 | Justin Anderson | Super Mario Bros. 2 | Action > Platformer | NES | G, T | Complete | 1.0 | 19 Aug 1997 |
| Castle Excellent CNROM to MMC3 | chronix | Castlequest | Action > Platformer | NES | O | Improvement | 1.0 | 29 Dec 2018 |
| Castle Mario Bros 3 | ramheroe | Super Mario Bros. 3 | Action > Platformer | NES | L | Complete | 1.0 | 05 May 2018 |
| Castle Party | Leet Sketcher | Final Fantasy III | Role Playing | SNES | L | Bug Fix | 1.3 | 13 Jul 2017 |
