http://bugs.winehq.org/show_bug.cgi?id=23578
--- Comment #78 from Tom Hackers tomhackers@gmail.com 2010-07-21 04:59:00 --- Seems like this patch works for l4d engine (and any source engine) games as well. Played Alien Swarm with this patch, no lag spikes as well (played for ~90 minutes).