Grab this phenomenal FPS trilogy as a set of free games while you can
Doom 3 might not be like the rest of the series when looking back at it, but when the survival horror take on the most iconic FPS game of all time is available for free, there's very little reason to complain about giving it a go for the first time. If you're an Amazon Prime subscriber you can get Doom 3 and keep it forever, and it's a classic worth giving a try if you never played it.
Oculus Rift no longer shipping with Doom BFG
Doom 3: Not the BFG Edition returns to Steam; BFG source code coming soon
Doom 3: BFG Edition The Lost Mission reuses entire rooms from original game