Very impressive for a fan-made game. It's a great way of killing 30 minutes!
Gameplay: Pretty repetetive campaign mode. You can just run through the entire levels, and beat it as long as you complete the objectives. If you decided to kill as well, it's pretty fun. You have partners sometimes as well. You even have vehicles, just the warthog actually, and it's quite fun driving it since it's so easy. Then there's the Multiplayer mode. The only way to play Multiplayer is if the other players know your IP address or if you know the other players IP address which limit’s the multiplayer. But the gameplay was a great attempt for these developers.
Graphics: Anything you would expect from a 2D Platformer, although 3D would've been nice.
Sound: Pretty much the same sounds from Halo games, the music, the sound effects, pretty much everything all from Halo. So you should all be familiar with those.
Value: If you are able to find someone to play with on Multiplayer, it would be pretty fun, and you'd be coming back to it from time to time. Even the campaign mode, with different difficulties might have you coming back to it sometimes.
Tilt: Altogether, this was an excellent attempt at making a prequal by fans. Although It would’ve been nice if they used some of today’s technology to make 3D gameplay and some more variety. It’s definetly a great way of killing 30 minutes of your life. Remember, it's a free and short download.