It's fun, stress-free, colorful, and will have you smiling rather than sweating like many shooters do.
What I want to say is, for 1200 points, Monday Night Combat is a fun game that is very easy to grasp since one of the controller settings uses nearly identical layouts to Call of Duty and Halo. This let's you get into the action quick and start having fun.
Game modes are easy to understand. Blitz is basically Call of Duty Zombies, or Gears of War Horde, except in a much more colorful and stress-free environment. You defend your MoneyBall against waves of robots which vary in difficulty. There is local Blitz by yourself or splitscreen, and there is online Blitz which you can also being a splitscreen friend along.
Online vs mode is called Crossfire. Your team of 6, and its AI robots, tries to attack the other team's Moneyball. The other team of 6, with its own AI robots, tries to also attack your moneyball at the same time. It's easy to understand and a blast.
You have six classes to choose from. They're pretty self explanatory but you'll have to use each one before you can make a final decision on which one you'll usually play as. One word of warning.. Assassins are annoying to play against!
Anyways, it's 1200 points. Just get it and try it. At the very least it'll pay for itself with one night of playing but trust me, you'll be back for more.