| Top Gun MMC5 Patch | Dracula X | Top Gun | Simulation | NES | O | Improvement | 1.2 | 18 Aug 2019 |
| Top Gun (Japan) MMC5 Patch | Dracula X | Top Gun | Simulation | NES | O | Improvement | 1.2 | 18 Aug 2019 |
| Toxic Crusaders Easy | chronix | Toxic Crusaders | Action > Beat 'Em Up | NES | GP | Improvement | 1.0 | 28 Apr 2019 |
| Track & Field CNROM to MMC3 | BZK | Track and Field | Sports | NES | O | Improvement | 001 | 08 May 2017 |
| Trauma Center Under the Knife 2 Wii Controls Hack | Greiga Master | Trauma Center: Under the Knife 2 | Simulation | NDS | GP | Improvement | 1.01 | 07 Feb 2014 |
| Trojan UNROM to MMC3 | BZK | Trojan | Action > Platformer | NES | O | Improvement | 001 | 11 Oct 2016 |
| Truxton/Tatsujin Arcade colors/sprites/backgrounds | fusaru | Truxton | Action > Shooter | GEN | G | Improvement | 1.00 | 27 Mar 2016 |
| Turrican Fixed | Linkuei | Turrican | Action > Platformer | GEN | G, GP | Bug Fix | 1.5 | 06 Sep 2015 |
| Turrican - health fix and unlimited continue | NinjAkira | Turrican | Action > Platformer | GEN | GP | Improvement | 1.0 | 01 Jun 2019 |
| Twin Cobra/Kyuukyoku Tiger Arcade tiles/sprites/colors | fusaru | Twin Cobra | Action > Shooter | GEN | G | Improvement | 2.00 | 14 Jul 2016 |
| Disable flashing | TEPA6ANT | Twin Cobra | Action > Shooter | NES | G, O | Bug Fix | 1.0 | 29 Sep 2017 |
| Twin Hawk / Daisenpuu arcade style tiles/sprites/colors | fusaru | Twin Hawk | Action > Shooter | GEN | G | Improvement | 1.0 | 11 Feb 2017 |
| Twinbee AC | Messatu | TwinBee | Action > Shooter | NES | G | Improvement | 0.3.2 | 21 Jan 2018 |
| Van-1 | Inventor | TwinBee | Action > Shooter | NES | G | Improvement | 1.0 | 01 Jan 2001 |
| Pop'n TwinBee: Rainbow Bell Adventures - Region Fix | SunGodPortal | TwinBee: Rainbow Bell Adventure | Action > Platformer | SNES | O | Improvement | 1.0 | 21 Jan 2015 |
| Twinkle Tale - Alternate Style | Pyron | Twinkle Tale | Action > Shooter | GEN | G | Improvement | 1.0 | 25 May 2016 |
| Uchuu Senkan Gomora Arcade Colors | fusaru | Uchuu Senkan Gomora | Action > Shooter | GEN | G | Improvement | 1.01 | 18 Feb 2016 |
| Ultima: A New Exodus | ludmeister | Ultima: Exodus | Role Playing | NES | T, GP | Improvement | 1.0 | 17 Jan 2012 |
| Ultima: Touhou of Virtue | DASTARD | Ultima: Runes of Virtue | Role Playing > Action RPG | GB | G, T, GP | Complete | 1.02 | 01 May 2009 |
| Ultimate Mortal Kombat Trilogy | KABAL_MK | Ultimate Mortal Kombat 3 | Action > Fighting | GEN | G, S, L, T, GP, O | Complete | 23 (5125) | 30 Mar 2014 |
