: Originally planned as an expansion to RtCW, this became a completely free-to-play, standalone multiplayer game . It contains much of the DNA of the original game's multiplayer and remains active to this day.
In 2010, the source code for the RtCW engine (id Tech 3) was released under the GPL license. This led to several community-driven versions. return-to-castle-wolfenstein-pc-game-free-download
How to Play Return to Castle Wolfenstein for Free on Modern PC : Originally planned as an expansion to RtCW,