Let the buyer beware.
If you own a 4GB Xbox 360 Slim and have a hankering to play Halo: Reach, you may be in for a bit of a bummer. Gizmodo reports that co-op mode for that game will not work unless you have an actual HDD. Adding USB flash drives to your slim will not fix the problem.
Don't Miss: Nintendo Switch: Everything You Need To Know
Don't Miss: Incredible Pokemon Gifts
The Xbox support section says (belatedly) that "some" aspects of Halo: Reach require an HDD. For those of you with 4 GB consoles, your only option for co-op is to buy a $129.99 slim hard drive. Which, added to the slim's cost, will set you back more than a 250 GB Xbox 360.