Hello @qwazer, your system information indicates that llvmpipe was being used, which is the faster software opengl implementation in mesa. Source 1 games are not expected to work with llvmpipe, and even if they do, there is a severe performance penalty for using the cpu to render games.
Nothing extracted yet.
System Info https://gist.github.com/qwazer/5510743
Log with error
3416 Segmentation fault ${GAME_DEBUGGER} "${GAMEROOT}"/${GAMEEXE} "$@"
https://gist.github.com/qwazer/5510772
Steps to reproduce: create local game or join to any remote game