If you don't want to wait for the Halo: Master Chief Collection when it's released this fall, you can get a jump on checking out and catching up on most of the Halo games available - sans the first two. Right now Gamestop is offering Halo 3, Halo 4, Halo ODST and Halo Reach for the low low price of just $17.99. That's four games for $18.
Granted this won't get you exactly what's included in the MC: Collection, which features a remastered version of Halo 1 and 2 as well as full multiplayer support and...EVERY MULTIPLAYER MAP EVER. That's obviously the better deal, but if your aging Xbox 360 is looking for a workout, perhaps this will scratch that itch before you pull the trigger on an Xbox One.
Go grab the deal online now at Gamestop or head to your local store for that immediate gratification.