| Seiken Densetsu 3 / Trials of Mana - Better Starting Stat | hmsong | Trials of Mana | Role Playing > Action RPG | SNES | GP | Improvement | 1.3 | 27 Oct 2020 |
| Seiken Densetsu 3 / Trials of Mana - Black Rabite | hmsong | Trials of Mana | Role Playing > Action RPG | SNES | GP | Improvement | 1.3 | 25 Nov 2020 |
| Seiken Densetsu 3 / Trials of Mana - Less Grinding | hmsong | Trials of Mana | Role Playing > Action RPG | SNES | GP | Improvement | 1.4 | 24 Jan 2021 |
| Trip World Casual Mode | llakssz | Trip World | Action > Platformer | GB | G, GP, O | Improvement | 1.0 | 03 Oct 2019 |
| Trog Famicom 2P | nattou | Trog! | Action | NES | O | Improvement | 1.0 | 10 Mar 2020 |
| Trog! NES - Fair PvP hack | nattou | Trog! | Action | NES | GP | Improvement | 1.0 | 24 Mar 2020 |
| 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 |
| Turbo Outrun Enhanced Colors | Dolsilwa | Turbo Outrun | Racing | GEN | G | Improvement | 1.0 | 02 May 2020 |
| 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 |
| uforia 1.1 Mario Bros. character | sebastianangel | U-four-ia: The Saga | Action > Platformer | NES | G | Complete | 1.1 | 11 Oct 2020 |
| Triangle Channel Bug Fix | LucianoTheWindowsFan | U-four-ia: The Saga | Action > Platformer | NES | S | Bug Fix | 1.0 | 14 Nov 2020 |
