All Games — starting with O

One-on-One Basketball

1 February 1987

Office Suicide Saga

4 June 2016

Outburst

31 December 2018

O-Box: Ball Shooter

12 July 2017

Oolite

1 July 2004

Outlaw Golf: 9 More Holes of X-Mas

15 December 2003

Outlaw Volleyball Red Hot

1 October 2003

Olympic Hockey 98

23 February 1998

One Piece: Gear Spirit

30 August 2007

One Bit

10 July 2017

Orb-3D

1 November 1990

Otaku no Seiza: An Adventure in the Otaku Galaxy

31 July 1991

Outlanders

4 December 1987

Onyanko Town

21 November 1985

Oishinbo: Kyuukyoku no Menu 3-bon Shoubu

25 July 1989

Osomatsu-kun: Back to the Me no Deppa no Maki

8 December 1989

Oeka Kids: Anpanman to Oekaki Shiyou!!

25 October 1990

Oeka Kids: Anpanman no Hiragana Daisuki

26 April 1991

Otto's Ottifanten: Baby Bruno's Nightmare

31 December 1998

Out of Gas

1 November 1992

Ozzy & Drix

17 December 2003

Operation: Armored Liberty

3 December 2003

Oriental Blue: Ao no Tengai

24 October 2003

Onmyou Taisenki: Zeroshiki

9 December 2004

One Piece: Going Baseball - Kaizoku Yakyuu

11 March 2004

One Piece: Dragon Dream!

28 April 2005

Ojarumaru: Gekkou Machi Sanpo de Ojaru

5 September 2003

Ohanaya-san Monogatari GBA

19 August 2002

Oshare Princess

24 June 2002

Oddworld Adventures 2

19 January 2000

Outpost 2: Divided Destiny

25 August 1997

Order of Twilight

7 November 2012

Oberon

1 October 2015

Of Light and Darkness: The Prophecy

1 May 1998

Outpost L5

28 July 2017

OtterBash

13 July 2017

O'Leary Manager 2000

15 October 2000

Othello Millennium

8 November 1999

Otto's Ottifanten: Kommando Stortebeker

1 February 2001

Our House: Party!

22 October 2009

Offshore Tycoon

31 March 2009

Offroad Extreme!: Special Edition

1 November 2007

Ocean Commander

6 June 2006

Oops! Prank Party

5 October 2010

Once Upon A Time

9 January 2011

OpenBVE

23 April 2009

Operation Crusader

31 December 1994

One Piece: Burning Blood - Marineford Edition

1 June 2016