I have Half-Life, Opposing Force, and Blue Shift on the cd discs. I also have them on my Steam account. Could I play them without being on Steam from the discs?
Both games will run perfectly fine from the discs without Steam. I played them both myself not too long ago and had no troubles, at least in single player. I didn't try to play online; you didn't need Steam to play them online when they were released, but Valve might have changed that since then.
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