We're getting more new Doom in the form of Doom Eternal before the end of this year. You can find the Doom 4 Vanilla mod here in the meantime. You'll need to own a copy of Doom 2 for it to work.

Doom Eternal is the latest freebie to be provided by Amazon as part of its Prime Gaming package, which gives Prime subscribers access to a number of free games every month.

All of Doom's DLC is free now, but it comes as a ludicrous 34GB update—even if you don't plan to play multiplayer.