| Game Name | System |
|---|
| Another World | Atari 800 |
| Another_Brick_from_the_Wall | Atari 800 |
| Ant Eater (1982)(Romox)[k-file] | Atari 800 |
| Ant Wars (19xx)(Gary Evans)[bas2boot] | Atari 800 |
| Anti_Sub_Patrol | Atari 800 |
| Antquest | Atari 800 |
| Ants in Your Pants | Atari 800 |
| Apollo_11 | Atari 800 |
| Apple Panic (1982)(Broderbund) | Atari 800 |
| Apples (19xx)(-)[bas2boot] | Atari 800 |
| Aqua Marina | Atari 800 |
| Aquanaut | Atari 800 |
| Aquatron (1983)(Sierra) | Atari 800 |
| Arabela | Atari 800 |
| Arabela II - Part I | Atari 800 |
| Arabela II - Part II | Atari 800 |
| Arachnid (1982)(John Ortiz) | Atari 800 |
| Arax (1987)(Com-Art Software) | Atari 800 |
| Arcade Fruit Machine (19xx)(Zeppelin) | Atari 800 |
| Arcade_Adventure | Atari 800 |
| Arcade_Bonanza | Atari 800 |
| Arcade_II | Atari 800 |
| Arcanoid IV (1988)(Rambit)(pl)[k-file] | Atari 800 |
| Archers - Part I | Atari 800 |
| Archers - Part II | Atari 800 |
| Archers - Part III | Atari 800 |
| Archers - Part IV | Atari 800 |
| Archon (1983)(Electronic Arts).atr | Atari 800 |
| Archon II - Adept (1984)(Electronic Arts)[k-file] | Atari 800 |
| Ardeny 1944 (1995)(L.K. Fire-Bird)(pl)[k-file] | Atari 800 |
| Ardy the Aardvark | Atari 800 |
| Areas_and_Volumes | Atari 800 |
| Arena | Atari 800 |
| Arena (1982)(Med Systems) | Atari 800 |
| Arena 3000 (1982)(Microdeal)[k-file] | Atari 800 |
| Arena_Racer | Atari 800 |
| Arex (1983)(Adventure International).atr | Atari 800 |
| Arithmetrix | Atari 800 |
| Arkaneth I | Atari 800 |
| Arkaneth II | Atari 800 |
| Arkanoid (1987)(Taito) | Atari 800 |
| Arkanoid II (1988)(Pink Softhard)[k-file] | Atari 800 |
| Arkanoid III | Atari 800 |
| Arkanoid_II_Prof_Soft_Amsterdam | Atari 800 |
| Arkon | Atari 800 |
| Armor Assault | Atari 800 |
| Arnal a dva draci zuby | Atari 800 |
| Arnie | Atari 800 |
| Arno_Boulder_Dash_01 | Atari 800 |
| Arno_Boulder_Dash_02 | Atari 800 |
| Arno_Boulder_Dash_03 | Atari 800 |
| Arno_Boulder_Dash_04 | Atari 800 |
| Arno_Boulder_Dash_05 | Atari 800 |
| Arno_Boulder_Dash_06 | Atari 800 |
| Arno_Boulder_Dash_07 | Atari 800 |
| Arno_Boulder_Dash_08 | Atari 800 |
| Arno_Boulder_Dash_09 | Atari 800 |
| Arno_Boulder_Dash_10 | Atari 800 |
| Arno_Boulder_Dash_11 | Atari 800 |
| Arno_Boulder_Dash_12 | Atari 800 |
| Arno_Boulder_Dash_13 | Atari 800 |
| Arno_Boulder_Dash_14 | Atari 800 |
| Arno_Boulder_Dash_15 | Atari 800 |
| Arno_Boulder_Dash_16 | Atari 800 |
| Arno_Boulder_Dash_17 | Atari 800 |
| Arno_Boulder_Dash_18 | Atari 800 |
| Arno_Boulder_Dash_19 | Atari 800 |
| Arno_Boulder_Dash_20 | Atari 800 |
| Around the Planet (1994)(Mirage)(pl) | Atari 800 |
| Around_the_World | Atari 800 |
| Arrow One (19xx)(-)[bas2boot] | Atari 800 |
| Artefakt Przodkow (1992)(ASF)(pl) | Atari 800 |
| Artillery | Atari 800 |
| Artillery Simulator (19xx)(-)[BASIC] | Atari 800 |
| As You Like It | Atari 800 |
| Ashido | Atari 800 |
| Assignment 46 (19xx)(Victor T.Albino)[BASIC] | Atari 800 |
| Asteraxix 2k | Atari 800 |
| Asteroid Battle | Atari 800 |
| Asteroid Miners | Atari 800 |
| Asteroid_Run | Atari 800 |
| Asteroid_Storm | Atari 800 |
| Asteroids (1981)(Atari).atr | Atari 800 |
| Asteroids II (19xx)(Incubus)[k-file] | Atari 800 |
| Asteroids M4 | Atari 800 |
| Astra Phantasm (1983)(J.R. Owen) | Atari 800 |
| Astro Blaster Pinball (19xx)(-)[created with PCS] | Atari 800 |
| Astro Chase (1982)(First Star) | Atari 800 |
| Astro Droid (1987)(Red Rat Software)(PAL)[chaos loader] | Atari 800 |
| Astro Road | Atari 800 |
| Astro Warriors (1982)(Apogee) | Atari 800 |
| Astro4 Road | Atari 800 |
| Astro_Quotes | Atari 800 |
| Astrogrover (1984)(CBS) | Atari 800 |
| Astrologie | Atari 800 |
| Astrology (1982)(Antic)[BASIC] | Atari 800 |
| Astromeda (1987)(Rino)(PAL) | Atari 800 |
| Astron IX (1982)(Cosmi) | Atari 800 |
| Astron_IV | Atari 800 |
| Astrostorm | Atari 800 |
