The original first-person shooter lineage — freeware roots live on.
Wolfenstein 3D popularized the FPS. PlayBound frames the franchise around legal freeware shareware roots and open-source ports such as ECWolf. Prefer redistributable engines and shareware; commercial remasters use their official stores.
Minimum
1 GHz CPU · 512 MB RAM · Any GPU · 200 MB storage
Recommended
Any modern PC · ECWolf port