125 GAMES
Once upon a Time - Abracadabra
System 4
Adventure - Miscellaneous
Low
ST, STe
Once upon a Time - Baba Yaga
Coktel Vision
1991
Once upon a Time - Caperucita Roja
Once upon a Time - Le Petit Chaperon Rouge
Onemore Breakout 1.3 [preview]
[no publisher]
1990
Arcade - Breakout / Pong / Circus
Online Backgammon 1.7
Board Game - Backgammon
High
Onslaught
Hewson
1989
Shoot'em Up! - Horizontal Scrolling
Onslaught [Re-release]
Mirror Image
Silica Distribution Ltd.
Onyx [Licenceware]
Budgie UK
Oo-Topos
Polarware, Inc.
1986
Adventure - Text / Graphics
ST, STe, TT
Ooze
Ariolasoft (Germany)
1988
Adventure - Text
Low, Medium, High
Ooze 1.2e
Dragonware Games
Operation Blue Sunrise 3.00
1992
Operation Garfield
Shoot'em Up! - Crosshair
STe Only, Falcon030
Operation Harrier
US Gold
Shoot'em Up! - Multi-Directional
Operation Harrier [Re-release]
Kixx
Operation Hongkong
HGSS-Productions
Low, High
Operation Hormuz
Again Again
ST
Operation Hormuz [Re-release]
Alternative Software
Opération Jupiter
Infogrames
Simulation - Miscellaneous
Operation Neptune
Arcade - Miscellaneous
Operation Neptune [Re-release]
Smash 16
Erbe Software
Operation Overlord - The Invasion of Europe 6 June-28 August 1944
Simulations Canada
Strategy - Wargame
Medium, High
ST, STe, TT, Falcon030
Operation Skuum [Falcon030]
Logitron
1996
VGA, RGB
Falcon030
Operation Skuum [Falcon030] [preview]
Operation Stealth
Adventure - Point and Click
Delphine Software
Operation Stealth [Re-release]
Kixx XL
1993
Operation Stealth [bundle]
Naksha
Operation Wimp! [Licenceware]
Opus No 1
Arcade - Maze
Oracle Horse Tipster
Esp Software
Gambling - Racing
Orbit 2000 [Budget]
Byte Back
Shoot'em Up! - Vertical Scrolling
Orbit 2000 [Re-release]
Orbital Destroyer
Trojan Software
Oriental Games
Micro Style
Sports - Boxing / Martial Arts
Oriental Games [Re-release]
Original (The)
1994
Arcade - Boulder Dash
Low, VGA, RGB
Original (The) [registered]
Delta Labs Media
1995
Original Adventure
Orion's Run 1.2
Beery's Bit
1987
Orion's Run 0.4 [preview]
Orion's Run 0.7 [preview]
Ork
Psygnosis
Arcade - Platformer (Scrolling)
Ortho - CM
Micro-C
Education - Language Arts
![Onemore Breakout 1.3 [preview]](https://www.atarimania.com/st/screens/onemore_breakout_[ifa].png)
![Onyx [Licenceware]](https://www.atarimania.com/st/screens/onyx_budgie_uk.gif)
![Operation Harrier [Re-release]](https://www.atarimania.com/st/screens/operation_harrier_kixx.png)
![Operation Skuum [Falcon030]](https://www.atarimania.com/st/screens/operation_skuum_[falcon030]_logitron_2.png)
![Operation Skuum [Falcon030] [preview]](https://www.atarimania.com/st/screens/operation_skuum_preview_[falcon030]_logitron.png)
![Operation Stealth [Re-release]](https://www.atarimania.com/st/screens/operation_stealth_kixx_xl_4.png)
![Operation Stealth [bundle]](https://www.atarimania.com/st/screens/operation_stealth_naksha_bundle_4.png)
![Operation Wimp! [Licenceware]](https://www.atarimania.com/st/screens/operation_wimp!_budgie_uk.gif)
![Orbit 2000 [Budget]](https://www.atarimania.com/st/screens/orbit_2000_byteback.gif)
_[no_publisher].png)
![Original (The) [registered]](https://www.atarimania.com/st/screens/original_(the)_registered_delta_labs_media_2.png)
![Orion's Run 0.4 [preview]](https://www.atarimania.com/st/screens/orion_s_run_0_4_[no_publisher].gif)
![Orion's Run 0.7 [preview]](https://www.atarimania.com/st/screens/orion_s_run_0_7_beery_s_bit.gif)
