- id Tech 1: Doom(1993), Doom 2 (1994)
- id Tech 2: Quake (1996), Quake 2 (1997)
- id Tech 3: Quake 3 Arena (1999)
- id Tech 4: Doom 3 (2004)
- id Tech 5: Rage (2011)
"We need to get to shorter cycles," Hollenshead told VG247. "And I think part of that is that we can't be doing a revolutionary technology with every game we develop." To that end, the studio's upcoming Doom 4 will use – you guessed it – id tech 5! "We have to go to a bit more of an iterative technology approach," he admitted, adding, "I think it's a completely doable thing, but I don't think it just happens without putting some effort into it."
Luckily, with Bethesda's deep pockets backing the studio now, id is able to work on two games in parallel, without risking everything. "The capital required to put both those games in production – the means and size to do them at a triple-A level – would have been a literal "bet the company" sort of thing," Hollenshead explained. So, after Rage ships does that mean id can finally get to work on that Commander Keen reboot we've been waiting for all these years?