| Atari 400/800 type-in |  Math Quiz | 1983 | SoftSide Publications, Inc. |
| Atari 400/800 type-in | Maxipede | 198? | Shift Editions Paris, France |
| Atari 400/800 type-in | Maxter Mind | 1983 | ANTIC Publishing |
| Atari 400/800 type-in | Maze Search | 1980 | SoftSide Publications, Inc. |
| Atari 400/800 type-in | Maze War | 198? | ANALOG Computing |
| Atari 400/800 type-in | Mazerunner | 1989 | ANALOG Computing |
| Atari 400/800 type-in | Melody Dice | 1981 | SoftSide Publications, Inc. |
| Atari 400/800 type-in | Messiah | 1981 | SoftSide Publications, Inc. |
| Atari 400/800 type-in | Meteor Storm | 1980 | SoftSide Publications, Inc. |
| Atari 400/800 type-in | Micro-Man | 1988 | Markt & Technik |
| Atari 400/800 type-in | Midas Maze | 198? | ANALOG Computing |
| Atari 400/800 type-in | Miner P | 1981 | SoftSide Publications, Inc. |
| Atari 400/800 type-in | Mineur | 198? | Shift Editions Paris, France |
| Atari 400/800 type-in | Mini Golf | 1981 | SoftSide Publications, Inc. |
| Atari 400/800 type-in | Mini Golf | 1981 | EMAP East Midlands Allied Press |
| Atari 400/800 type-in | Minigolf | 1983 | SoftSide Publications, Inc. |
| Atari 400/800 type-in | Money Hungry | 1984 | ANALOG Computing |
| Atari 400/800 type-in | Monte Carlo | 1987 | Compute! Publications, Inc. |
| Atari 400/800 type-in | Moon Lord | 1986 | ANALOG Computing |
| Atari 400/800 type-in | Motorcycle Maze | 1980 | ANALOG Computing |
| Atari 400/800 type-in | Munchkin Attack | 1982 | SoftSide Publications, Inc. |
| Atari 400/800 type-in | Number Battle | 1981 | SoftSide Publications, Inc. |
| Atari 400/800 type-in | Number Race | 1982 | SoftSide Publications, Inc. |
| Atari 400/800 type-in | Octadraw | 1982 | EMAP East Midlands Allied Press |
| Atari 400/800 type-in | Oelsuche | 198? | Markt & Technik |
| Atari 400/800 type-in | Old Glory | 1981 | SoftSide Publications, Inc. |
| Atari 400/800 type-in | Olympic Duel | 198? | ANTIC Publishing |
| Atari 400/800 type-in | One for the Road | 1985 | ANALOG Computing |
| Atari 400/800 type-in | Operation: Sabotage P | 1982 | SoftSide Publications, Inc. |
| Atari 400/800 type-in | Outer Space Attack | 1982 | SoftSide Publications, Inc. |
| Atari 400/800 type-in | Over the Orchard Wall | 1983 | EMAP East Midlands Allied Press |
| Atari 400/800 type-in | Pizza Hotel | 1982 | SoftSide Publications, Inc. |
| Atari 400/800 type-in | Planet of Doom | 1984 | Markt & Technik |
| Atari 400/800 type-in | Planetary Defense | 1984 | ANALOG Computing |
| Atari 400/800 type-in | Player Missile | 198? | Shift Editions Paris, France |
| Atari 400/800 type-in | Poker Squares | 1983 | SoftSide Publications, Inc. |
| Atari 400/800 type-in | Pong | 198? | ANALOG Computing |
| Atari 400/800 type-in | Popcorn! | 198? | ANALOG Computing |
| Atari 400/800 type-in | Quest 1 P | 1981 | SoftSide Publications, Inc. |
| Atari 400/800 type-in | R.O.T.O. | 198? | ANALOG Computing |
