The latest Humble Indie Bundle makes it easy to get some Risk of Rain co-op games up and running. The metroidvania roguelike supports both local and online play for up to four people, and since one Bundle purchase nabs you four copies, you've got a ready-made party.
Risk of Rain is set in the distant future where space travel is as common as burritos. One space train was carrying some unusual cargo when, surprise surprise, something went wrong. It gets shot out of orbit and crashes on a mysterious planet. Now you and your pals get to hunt down the exit teleporter while trying to stay alive. Don't worry, it's really easy and no one's going to die. (Insert sarcasm marker here.)
As per usual, the Humble Indie Bundle allows you to pay what you want for a few games, pay more than the average to unlock more games, and pay a larger amount for a special game. To grab your four copies of Risk of Rain, you'll need to beat the average price (sitting at around $6.75 at the time of writing). Since the game normally costs around $10 for a single copy, that's still a huge deal. Once you buy the bundle you'll receive sharable redemption codes that must be used by November 28th in order to be valid. After that, no sharing allowed.
The single player games are nothing to sniff at, either. Amnesia: A Machine for Pigs is part of the bundle, as is Insanely Twisted Shadow Planet, bot extremely good indie games. Until November 25th, you can also grab a free copy of Teleglitch: Die More Edition, Paradox Interactive's twitchy roguelike shooter, just by entering your e-mail address. Might as well, right? Always room to add to your backlog!
Source: Humblebundle.com