| Aka: | Dimension of the Past, dopa, Quake |
| Console: | PC |
| TV Standard: | Region Not Set |
| Developer(s): | Machine Games |
| Publisher(s): | id Software |
| Release Date: | 2016-06-24 |
| Players: | 4 |
| Co-op: | No |
| ESRB: | AO - Adult Only 18+ |
| Type: | Action, Shooter |
Episode 5: Dimension of the Past (called "DOPA" for short) is an add-on episode for Quake developed by MachineGames, to commemorate the game's 20th anniversary. It's available to download for free.
Despite not being developed by id Software themselves, the episode is considered semi-official, being developed by a fellow Zenimax-owned company that has previously co-operated with id Software. The episode also contains many allusions and callbacks to Quake proper, such as the re-appearance of the Dopefish easter egg, along with the final level of the episode being almost identical to Shub-Niggurath's Pit.
