IBM PC-compatible DOS
Software entity
| 1973 - CP/M 0.1 released |
| 1980 - 86-DOS released |
| 1984 - MS-DOS 3.0 released |
| 1988 - MS-DOS 4.0 released |
| 1990 - DR-DOS 5.0 released |
| 1991 - DR-DOS 6.0 released |
| 1993 - PC/MS-DOS 6.1; development permanently diverges |
| 1998 - FreeDOS released |
| 2002 - DOSBOX released |
Any tags related directly to the x86 CPU architecture DOS variants.
These are all fully backwards compatible (except MS-DOS 4.0 & 4.01). Games that do not work in later versions of DOS (except MS-DOS 4.0 & 4.01) can be assumed to having exploited undefined behaviour or bugs in older versions.
This is a container group; its children are:
| DOS 1.x | Requires DOS 1.0 or newer. (too short) | 1973 / 2014 | 25 games |
| DOS 2.x | Requires DOS 2.0 or newer. (too short) | 1981 / 2014 | 113 games |
| DOS 3.x | Requires DOS 3.0 or newer. (too short) | 1984 / 2015 | 98 games |
| DOS 4.x | Requires the maligned MS-DOS 4.0 or MS-DOS 4.01 (these are entirely different from IBM PC-DOS 4.00 & IBM PC-DOS 4.01). | 1984 / 2017 | 29 games |
| DOS 5.x | Requires DOS 5.0 or newer. (too short) | 1989 / 2017 | 83 games |
| DOS 6.x | Requires DOS 6.0 or newer. (too short) | 1990 / 2017 | 25 games |