| Pinball |  Master Stroke | 1977 | Recel, S.A. Madrid, Spain |
| BASIC soft. type-in | Masterbagels | 1977 | Creative Computing Soft. |
| FORTRAN soft. type-in | Mastermind | 1977 | Shefler, Mike |
| Tektronix 4050 soft. | Mastermind | 1977 | Bruck, Howard |
| Intel 8080 CPU soft. | Mastermind P | 1977 | Intel Corp. |
| MOS KIM-1 cass. | Mastermind | 1977 | Technical Systems Consultants, Inc. |
| Ohio Scientific soft. | Mastermind P | 1977 | Technical Systems Consultants, Inc. |
| BASIC soft. type-in | Mastermind - A Game of Logic | 1977 | People's Computer Co. |
| MITS Altair 8800 soft. | Mastermind II | 1977 | Creative Computing Soft. |
| Wang 2200 soft. | Mastermind II P | 1977 | Unknown |
| Pinball | Mata Hari Model 1104 | 1977 | Bally Mfg. Co. Chicago, IL, USA |
| PTC SOL-20 cass. | Matches P | 1977 | Processor Technology Corp. |
| Unisonic Champion 2711 cart. | Math | 1977 | Unisonic |
| Atari 2600 cart. | Math Model 99808 | 1977 | Sears Chicago, IL, USA |
| Handheld game | Mathemagician | 1977 | APF Electronics, Inc. |
| Radofin 1292 Advanced Programmable Video System cart. | Maths Two | 1977 | Radofin Electronics Germany |
| Xerox Alto soft. | Maze War P | 1977 | Wahrman & Guyton |
| Arcade Video game | Meadows Lanes Model ML-1 | 1977 | Meadows Games, Inc. Sunnyvale, CA, USA |
| Slot Machine | Merkur | 1977 | ADP Merkur GmbH Gauselmann Group Germany |
| Dedicated Console | Micro Ten | 1977 | Prinztronic |
| PTC SOL-20 cass. | Microchess P | 1977 | Micro-Ware, Ltd. |
| Zilog Z80 CPU soft. | Microchess P | 1977 | Micro-Ware, Ltd. |
| Intel 8080 CPU soft. | Microchess P | 1977 | Micro-Ware, Ltd. |
| CP/M 8in. disk | Microchess P | 1977 | Micro-Ware, Ltd. |
| Pinball | Mikoshi | 1977 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Pinball | Millionaire | 1977 | SEGA Enterprises, Ltd. Tokyo, Japan |
| BASIC soft. type-in | Mine8 | 1977 | Felt, Doug |
| Arcade Video game | Minesweeper | 1977 | Amutech, Ltd. Amusement Technology San Rafael, CA, USA |
| Redemption mechanical game | Mini Passball | 1977 | Kusuno |
| UNIX soft. | Mini-Kalah | 1977 | Stedman, Jon |
| Intel 8080 CPU soft. | Mini-Trek | 1977 | Southern California Computer Society |
| Motorola 6800 CPU soft. | Mini-Trek | 1977 | Southern California Computer Society |
| Dedicated Console | minimate Model 1104 | 1977 | Interstate |
| Bingo | Miss America Deluxe Model 1107 | 1977 | Bally Mfg. Co. Chicago, IL, USA |
| Handheld game | Missile Attack Model 2048 | 1977 | Mattel Electronics Mattel, Inc. |
| Arcade Video game | Missile-X | 1977 | Taito Corp. Japan |
| Motorola 6800 CPU soft. | Missionaries and Cannibals | 1977 | MicroSystems Group |
| Pool Table | Model 17 | 1977 | Valley Recreation Products, Inc. Bay City, MI, USA |
| Pool Table | Model 27 | 1977 | Valley Recreation Products, Inc. Bay City, MI, USA |
| Pool Table | Model 37 | 1977 | Valley Recreation Products, Inc. Bay City, MI, USA |
