After a level transition from bm_c1a3c to bm_c1a3a (these are what is said on saves) after you’ve taken out the marines rappelling down the shaft and you crawl into a vent, the game crashes before you get to brake the vent hatch on the other side.
hl2_4104_crash_2012_9_15T20_59_39C0.mdmp (93.4 KB)