47 GAMES

Atari 400 / 800 / XL / XE

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Obcy
Blue Kitten Software
2007
Arcade - Miscellaneous
D
Obrona Ziemi
Blue Kitten Software
2008
Shoot'em Up! - Miscellaneous
D
Occult Numbers
ERACE
1983
Brain - Mastermind
BAS
Ocean Detox
[no publisher]
2010
Shoot'em Up! - Bomber
XEX
X
Ockers & Adventure
Antic Public Domain
1985
Various
D
X
Octane
Project SERAPHIM
?
Education - Chemistry / Physics
D
Octopus
ArSoft Corporation
2011
Arcade - Miscellaneous
XEX
X
Odieus' Quest for the Magic Flingshot
1993
Odieus' Quest for the Magic Flingshot
CTH Enterprises
?
Adventure - Text
D
Odysseus
[unknown]
?
Pinball - Pinball Construction Set
PCS
Ohrožení Brittaniku
[no publisher]
1991
Adventure - Text
T
Oil Business
[no publisher]
1994
Strategy - Stock Market / Corporate
BAS
X
Old Testament of the Holy Bible (The)
Computers as Tutors!
?
Education - Religion / Esoterism
D
Olde House (Ye)
[no publisher]
1994
Adventure - Text
D
Olympian
[no publisher]
?
Sports - Athletics
XEX
Olympic Dual
Stanton, Jeffrey
?
Sports - Athletics
XEX
Omaze
[no publisher]
?
Arcade - Miscellaneous
One Moon and Two Suns
[no publisher]
2006
Arcade - Platformer (Scrolling)
K
onEscape
Vortador Games
2022
Adventure - Point and Click
K
Orakel (Das)
Rüsselsheimer Atari-Club / Party-Games
1989
Miscellaneous
D
Oranges and Lemons
KJB Programs
1983
Gambling - Slot Machine
XEX
Orbital Defense
[no publisher]
?
Shoot'em Up! - Horizontal Scrolling
D
Orbital Simulation
West Valley Atari Users Group
?
Education - Chemistry / Physics
BAS
Oregon Trail (The)
Softswap
1982
Simulation - Miscellaneous
BAS
Orioles Baseball
[no publisher]
1984
Sports - Baseball
XEX
Orion
Protocom
1985
Arcade - Miscellaneous
D
Orthographe
École Communale de Wihéries
?
Education - Spelling
D
Osadnicy
1995
Osmosis
[no publisher]
?
Cards - Solitaire
D
Osotos
Inufuto
2024
Arcade - Platformer (Single Screen)
K
X
Ostatni
Counter Software
1990
Shoot'em Up! - Miscellaneous
D
OTB
[no publisher]
1985
Gambling - Racing
BAS
Othello
[no publisher]
1981
Board Game - Reversi
BAS
Othello
Friday Fun Software
?
Board Game - Reversi
BAS
Othello 2024
White, Jerry
2024
Board Game - Reversi
D
Othello II
Sawfish Software
1990
Board Game - Reversi
Outland Quest Adventure #1 - Dungeons of Oti
Outland Quest Software
?
Adventure - Text
D
X
Outland Quest Adventure #2 - Motion Variable
Outland Quest Software
?
Adventure - Text
D
X
Outland Quest Adventure #3 - Terror Fair
Outland Quest Software
?
Adventure - Text
D
Outlaws
Spectre Software
1990
Shoot'em Up! - Crosshair
D
Outpost
Johnson, Jim
?
Arcade - Maze
XEX
Outpost
UKACOC
1983
Strategy - Wargame
TD
Outside Adventure
WASEO
2005
Arcade - Maze
D
Overflow 2021
Anschuetz / Weisgerber / Anschuetz
2021
Shoot'em Up! - Miscellaneous
XEX
Overflow Santa
Anschuetz / Weisgerber / Anschuetz
2025
Shoot'em Up! - Miscellaneous
XEX
Owari
[no publisher]
?
Board Game - Awari
BAS
Oxygen for Life
Sikor Soft
2013
Arcade - Avoid'em!
XEX