Comparison of Doom source ports

Below is a rough comparison of the source ports that are currently most popular.

Comparison by license, platform and supported games
Note that the "Games supported" list below refers to the latest versions of the games. Earlier versions may not function correctly or at all. The latest versions of the games are: Doom games v1.9, Heretic v1.3, Hexen v1.1, Strife v1.3 and Hacx v1.2. There is only one version of Chex Quest 1. Patches for upgrading old versions are listed in the game patch article.

Also note that the Chex Quest column below refers to Chex Quest 1 and not 2 or 3.

Comparison by visuals
Screenshot of every port running without add-ons, in each renderer mode it supports (unless of course a port looks the same in all rendering modes).