GBA Roms: O
O-Type By Calimero06
Object Demo By PeeBrain
Obsidian Demo 1
Obsidian Demo 2
Ochainu Kururin
Ochainu No Bouken Jima
Ochaken Kururin - Honwaka Puzzle de Hotto Shiyo
Ochaken no Bouken Jima - Honwaka Yume no Island
Ochaken no Heya
Ochaken no Yumebouken
OCZ Slideshow
Oddworld - Munch's Oddysee
Oddworld - Munchs Oddysee - GBA
OddWorld Demo By The Letter M
Ohanaya-san Monogatari
Ohanaya-san Monogatari GBA - Iyashikei Ohanaya-san Ikusei Game
Ohanaya-san ni narou!
Oils Well V0.9 By Yiri Kohl
Ojaru Maru - Tsuki Hikari Machi Tour De Ojaru
Ojarumaru - Gekkouchou Sanpo de Ojaru
OK Mountain Park Fire JPEG Slideshow
Okaitoku Series 5 - Puzzle & Tantei Collection
Okuman Chouja Game
Okumanchouja Game - Nottori Daisakusen!
Old Well, The By Athletic Design
Oldschool Memories Demo By IRATA
Oleminant By Birslip
One - Sharing Advance V0.8 By Tactics
One More Lost Turtle By Jeffres
One Piece
One Piece - Dragon Dream
One Piece - GBA
One Piece - Going Baseball - Haejeok Yaku
One Piece - Going Baseball - Kaizoku Yakyuu
One Piece - Ilgop Seomui Debomool
One Piece - Mezase! King of Paris
One Piece - Nanatsu Shima No Daihihou
One Piece Going Baseball
One Red Cube By Eidolon Industries
Onimusha Tactics
Onimusha Tactics - GBA
Onimusha Tactics Intro By Eurasia
Onimusha Tactics Intro By Mode7
Onimusha Tactics Trainer Menu By VENOM
Onimusha Tactics _BearTeam]
Onmyou Taisenki Zeroshiki
Onnanoko No Shikumi
Oolong Rabbit By Titney
Open Season
Open Season - GBA
Open Source GBA Demo By Odd
OpenDivX V0.11 By Milhouse31
OpenDivX V4.48 By Milhouse31
Opendivx V4.48 V0.1 By Milhouse31
Operation Armored Liberty
Operation Armored Liberty - GBA
Operation Armored Liberty Trainer Menu By VENOM
Operation Snow By FluBBa
Operation Stealth Intro By TRSI
Opium By JML
Orchid Tears Chapter 1 By Team Magnolia
Organya Demo V1.1
Organya Demo V1.2
Oriental Blue - Ao no Tengai
Original Harlem Globetrotters
Original Harlem Globetrotters - GBA
Orn Demo By Thomas Happ
Oshaberi Inco Club
Oshaberi Inko Club
Oshare Princess
Oshare Princess 2
Oshare Princess 2 And Doubutsu Kyaranabi
Oshare Princess 3
Oshare Princess 5
Oshare Princess EX Primo Debut Monogatari & Renai Uranai Daisakusen
Oshare Wanko
Osiris By Alistair Phillips
Othello
Othello 4K By Kristopher Smith
Othello Demo By Damien Marshall
Ottifanten Pinball
Ougon no Taiyo
Ougon no Taiyou - Hirakareshi Fuuin
Ougon No Taiyou - Hirakareshi Fuuin _CGP]
Ougon no Taiyou - Shitsu Warate Jidai
Ougon no Taiyou - Ushinawareshi Toki
Ougon No Taiyou - Ushinawareshi Toki + 19 NES
Our Breeding Series - My Ameba
Our Breeding Series - My Amoeba
Our Breeding Series - My Beetle
Out Of Space
Out Of Space V2
Outback Adventures
Outback Adventures - GBA
Outrun Demo V0.1 By Jetset
Outrun Demo V0.2 By JetSet
Outrun Demo V0.2a By Jetset
Outrun Demo V0.2b By Jetset
Over the Hedge
Over the Hedge - Beesten bij de Buren