Horde is an addicting, old-school impossible, two player co-op game with full external controller support. To get far, you need to have quick reflexes, and a little luck. Imagine the original Mario Bros, but the bad guys just collect at the bottom, making it harder and harder to resupply your ammo. The tiniest mistake can lead to a horde getting beyond control. Your only hope is to dive in the middle and fight your way to more ammo.
Horde can be played solo, with a friend, with the CPU as your teammate, or in versus mode, with larger side scrolling levels to go head-to-head against with the computer or your buddies.