- last post: 01.01.0001 12:00 AM PDT
You can install it on another comp without even removing it from the first one. Just sign on to your steam account on the other comp and download the HL2 files. Make sure you don't play on both comps at once or your account will be banned.
If you only want it on one machine, it would be a good idea to remove it from the other, just to be safe.