| Bit Improvement for FF4A | Deathlike2 | Final Fantasy IV Advance | Role Playing | GBA | GP | Improvement | 1.0a | 21 Dec 2008 |
| Bit Improvement | Deathlike2 | Final Fantasy II | Role Playing | SNES | GP | Improvement | 1.0a | 21 Dec 2008 |
| Bird Bars | Leet Sketcher | Final Fantasy III | Role Playing | SNES | G | Bug Fix | 1.0 | 10 Apr 2017 |
| Biraku Emblem: English Translation | Darrman | Fire Emblem: Monshou no Nazo | Strategy > Turn Based | SNES | G, T | Addendum | 1.0 | 01 May 2020 |
| Biraku Emblem | Binary Team | Fire Emblem: Monshou no Nazo | Strategy > Turn Based | SNES | G, L, T, GP | Complete | 2.03 | 26 Jun 2010 |
| Bionic Metroid | Defgav | Metroid | Action Adventure | NES | G, T | Improvement | 1.0 | 16 Jan 2003 |
| Bionic Commando Winter Edition | Matrixz | Bionic Commando | Action > Platformer | NES | G | Improvement | 0.1 | 28 Feb 2003 |
| Bionic Commando '99 | Chris M. Covell | Bionic Commando | Action > Platformer | NES | G, T | Improvement | 1.0 | 21 Feb 2006 |
| Bio Miracle MMC-5 Hack | MottZilla | Bio Miracle Baby Upa!! | Action > Platformer | NES | O | Improvement | 1.0 | 17 Aug 2008 |
| Binary Twist | Crying Onion | Binary Land | Action | NES | G | Complete | 1.1 | 14 Sep 2021 |
| Binary Land - Penguins Family | Guyver (X.B.M.) | Binary Land | Action | NES | G, T, GP | Improvement | 1.2 | 25 May 2010 |
| Binary City | AnS | Battle City | Action | NES | G, S, L, T, GP | Complete | 0.999 | 30 Jul 2009 |
| Billy Time! | BillyTime! Games | Super Mario World | Action > Platformer | SNES | G, S, L, T, GP, O | Complete | 14.0 | 18 May 2020 |
| Bill Mario COOL ADVENTURE | SpicyMarshmallow | Super Mario Bros. | Action > Platformer | NES | G, L, T | Complete | 1.0 | 27 Nov 2018 |
| Bigger Picture | torridgristle | New Ghostbusters II | Action | NES | G | Improvement | 1.0 | 27 Aug 2018 |
| Big's Fishing Derby | flamewing | Sonic the Hedgehog 2 | Action > Platformer | GEN | G, S, L, T, GP, O | Complete | 1.05.021a | 30 Apr 2016 |
| Big Trouble in Little China DX | Crying Onion | Bad Dudes | Action > Beat 'Em Up | NES | G | Addendum | 1.0 | 29 Mar 2019 |
| Big Trouble in Little China | pacnsacdave | Bad Dudes | Action > Beat 'Em Up | NES | G, T | Improvement | 1.1 | 08 Oct 2017 |
| Big Boo's Revenge | Tobias94 | Super Mario World | Action > Platformer | SNES | G, S, L, T, GP, O | Complete | 1.0 | 09 Jun 2013 |
| Big Apple 3AM (Turtles in Time) | bgvanbur | Teenage Mutant Ninja Turtles: The Hyperstone Heist | Action > Beat 'Em Up | GEN | L | Improvement | 0.01 | 19 Aug 2016 |
