If you buy the game in a local store, you'll get a CD-Key with the package. Use the CD-KEY to activate the game through steam. If you buy the game through steam, the CD-Key will be set on your account right away. Both ways, once activated through steam, you can download Half-Life fully free through steam. The game should be displayed in the game list.yes i will buy this game hl1 but how can i put the esf in steam :-? a little tutorial please :fight: