| id Tech 1 | Uses the original Doom's engine or some modification of it. (too short) | 1993 / 2013 | 28 games |
| id Tech 2 | Uses the id Tech 2 game engine developed by id Software. (too short) | 1997 / 2014 | 47 games |
| id Tech 3 | Uses the id Tech 3 game engine developed by id Software. (too short) | 1999 / 2016 | 86 games |
| id Tech 4 | Uses id Tech 4 game engine, developed by id Software. (too short) | 2004 / 2015 | 31 games |
| id Tech 5 | Uses the fifth generation of id Software's game engine. (too short) | 2011 / 2017 | 14 games |
| id Tech 6 | Uses the sixth generation of id Software's game engine. (too short) | 2016 / 2019 | 4 games |
| Id Tech 7 | Uses the seventh generation of id Software's game engine. (too short) | 2020 / 2020 | 4 games |
| Quake | Uses Quake's game engine. (too short) | 1996 / 2009 | 25 games |
