You can download and play the full game for 48–72 hours.
Go to Settings > Family and authorize library sharing. How To Left 4 Dead 1 For Free
Valve occasionally makes their classic titles "Free to Keep" during major milestones or sales. You can download and play the full game for 48–72 hours
If a friend owns the game, you can play it for free using . How To Left 4 Dead 1 For Free
The L4D2 community is much larger, making it easier to find free online matches. Steam Family Sharing
Valve ported every map and character from the original game into the sequel.