| TRS-80 cass. |  Kid Venture #3: Old McDonald's Farm Model 011-0124 | 1981 | Adventure International |
| TRS-80 cass. | Killer Gorilla | 1983 | Displayed Video Ypsilanti, MI, USA |
| TRS-80 cass. | King of the Hill | 1983 | Smith & Jones Soft. |
| TRS-80 cass. | Knight's Quest + Robot Chase + Horse Race Model 0003R | 1978 | Instant Soft., Inc. |
| TRS-80 cass. | Kriegspiel II | 1980 | Ramware |
| TRS-80 cass. | L'Invasion des Extras-terrestres | 1983 | Sivea S.A. Paris, France |
| TRS-80 cass. | Labyrinth | 1980 | Med Systems |
| TRS-80 cass. | Lafayette Escadrille | 1983 | Discovery Games |
| TRS-80 cass. | Lair of the Dragon | 1987 | Misosys, Inc. |
| TRS-80 cass. | Laser Defense | 1981 | Med Systems |
| TRS-80 cass. | Learning Fun I: Scurve Invaders | 1980 | Dick Smith Electronics |
| TRS-80 cass. | Life Ver. 7.4 | 198? | Superior Soft. |
| TRS-80 cass. | LifeTwo | 1979 | 80-NW Publishing Co. |
| TRS-80 cass. | Light Wars | 19?? | Aim Soft. |
| TRS-80 cass. | Lunar Lander Model 010-0094 | 198? | Adventure International |
| TRS-80 cass. | Magic Carpet Model 26-1919 | 1983 | Radio Shack Fort Worth, TX, USA |
| TRS-80 cass. | Masters' Golf | 1981 | Ramware |
| TRS-80 cass. | Maze-80 Model TR016 | 1979 | Programma International, Inc. |
| TRS-80 cass. | Meteor | 19?? | Aim Soft. |
| TRS-80 cass. | Meteor Mission | 1980 | Big Five Soft. Van Nuys, CA, USA |
| TRS-80 cass. | Meteor Mission 2 | 1980 | Big Five Soft. Van Nuys, CA, USA |
| TRS-80 cass. | Micro-80 Pinball Machine | 1980 | Micro-80, Inc. |
| TRS-80 cass. | Microchess | 1980 | Rainbow Computing, Inc. |
| TRS-80 cass. | Microchess P | 1978 | Microtronix |
| TRS-80 cass. | MicroChess | 1978 | Micro-Ware, Ltd. |
| TRS-80 cass. | Microcosm I | 198? | Basics & Beyond, Inc. Amawalk, NY, USA |
| TRS-80 cass. | Microcosm II | 198? | Basics & Beyond, Inc. Amawalk, NY, USA |
| TRS-80 cass. | Microcosm III | 198? | Basics & Beyond, Inc. Amawalk, NY, USA |
| TRS-80 cass. | MiGs & Messerschmitts | 1980 | Wesely & Maker |
| TRS-80 cass. | Mind Warp | 1980 | Instant Soft., Inc. |
| TRS-80 cass. | Mine Field | 1992 | Computer News 80 |
| TRS-80 cass. | Minefield Model TR017 | 1979 | Programma International, Inc. |
| TRS-80 cass. | Misadventure #5: Naked Nightmare | 1982 | Softcore Soft. Co. |
| TRS-80 cass. | Missile Attack Model 010-0102 | 1981 | Adventure International |
| TRS-80 cass. | Mission Impossible Adventure Model CS-3009 | 1979 | Creative Computing Soft. |
| TRS-80 cass. | Monty Plays Monopoly | 1980 | Ritam Corp. |
| TRS-80 cass. | Mysterious Adventures #2: Arrow of Death Part 1 | 1981 | Molimerx, Ltd. |
| TRS-80 cass. | Mysterious Adventures #2: The Time Machine | 1982 | Molimerx, Ltd. |
| TRS-80 cass. | Mysterious Adventures #3: Arrow of Death Part 2 | 1982 | Molimerx, Ltd. |
| TRS-80 cass. | Mysterious Adventures #5: Feasibility Experiment | 1982 | Molimerx, Ltd. |
