So you prefer, the DSL or GPL over GPLv2? The Doom Source License (or DSL) is the original source code license under which the Doom source code was released in late 1997.[1] I'll take this over the years and years the past licensing has caused any day.[2]

[1]https://doom.fandom.com/wiki/Doom_Source_License#:~:text=The....

[2] https://www.doomworld.com/forum/topic/44358-doom-license-amp...