The Zenimax website currently has a bunch of open job opportunities at the Texas branch of id Software, and several of them mention the positions will be involved in «the development of a long-running iconic action FPS.» Assuming that Wolfenstein remains with Machine Games and Rage with Avalanche, that leaves Doom and Quake as the only id games that fit the bill—unless your personal definition of FPS includes Commander Keen somehow.
The job listings repeatedly mention «sci-fi and fantasy» when
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