Fortnite, Epic Games' co-op tower defense game, has just sent out its first wave of alpha invites. If you signed up at Fortnite.com, check your email and spam filters.
"The emails either say 'You've Been Selected!' or 'You're Invited' depending on whether it's a friend invite or they've been selected by us," an Epic Games representative tells Joystiq. The company is currently pulling a random selection of folks who've signed up for the game over the past couple of years.