Because valve puts in the ongoing effort. Tell loki software they need to update the binaries of their games. Oh wait they don't exist anymore.
Valve puts ongoing effort also on the windows games… yet a sibling comment tried a game from valve instead of trying a game from a CD to do a fair comparison -_-'
Fair comparsion? This thread is about how you can't run old software on linux and are better of running windows software via wine. Running random versions instead of specific software versions is the point.