Bethesda/Microsoft bought them and took it off the licensing market, but it also seems questionable to me if it had a future there anyway, because they seemed t

Bethesda/Microsoft bought them and took it off the licensing market, but it also seems questionable to me if it had a future there anyway, because they seemed to have gone all-in on large but totally static environments with Rage, something which has not changed with Doom. That's not something that really works for many games. Looking at the family chart you can see that the last version that was widely licensed was idTech 3 - from 1999: https://upload.wikimedia.org/wikipedia/commons/8/85/Quake_-_family_tree_2.svg https://upload.wikimedia.org/wikipedia/commons/8/85/Quake_-_...