Today we released Steam Playtest!
Invite players to test your game directly through Steam, without the need to manage keys or external mailing lists.
Control how many players get access, when to add more players, and when to start/end testing.
@Steamworks
Very interesting.
I wonder how many games will implement this feature.
While I do love getting keys for a game, even if just for testing, this should certainly help in making testing easier to do.