Gordon Freeman Makes Me Nauseous

Black Mesa, Half-Life 2, and Motion Sickness

The first couple of times I tried to play Black Mesa I ended up quitting about 45 minutes into my session. It's not because of a dislike for the game; from what I've seen, the recently-released mod is a fun and relatively faithful remake of the original Half-Life. My main issue with Black Mesa is the fact that I start feeling queasy and need to stop playing after 45 minutes to an hour of gameplay.

538 Crossbow Shots in HL2, Set to the Tune of Cotton Eye Joe

I think this is the first time I've ever listened to that song in its entirety.