Same here. Played through Half Life 1 with no mishaps at all, but an hour or so of Half Life 2 used to make me very sick. As did others here, I found that the

Same here. Played through Half Life 1 with no mishaps at all, but an hour or so of Half Life 2 used to make me very sick. As did others here, I found that the solution was to disable bobbing. Worked like a charm IIRC.