Today (May 5) in 1992, Wolfenstein 3D was released for DOS. There are very few things as satisfying as killing digital Nazis.
I was asked to talk about Wolfenstein 3D a while back on the @dosgameclub podcast (https://www.dosgameclub.com/wolfenstein3d) with @Tijn and some other folks-- that was a blast.
I still play the DOS version of Wolf 3D sometimes myself, and sometimes the Xbox 360 version on the Series X. And sure, you could buy the original for just a dollar or two on Steam. But you can also download it for FREE (or play it for free in your browser via DOSBox) at one of my all-time favorite sites on the web, DOS Gaming dot com, here: https://dosgames.com/game/wolfenstein-3d.
Additionally, Wolfenstein 3D has been archived here at archive dot org! https://archive.org/details/wolfenstein3d_202105
