Spirit-X

Sniping spot in Moonbase:
In Moonbase, at the top of the map you should see two piles of rocks on the left and right, then get a sniper and go to the rocks and crouch. (This is very useful online).

Secret hiding spot in Waterfalls:
In Waterfalls go to the end of the map where all the food appears and their should be a hole, jump in the hole move to the left, and you should see a rock under the broken branch then press A then Y and then you should be under the broken tree. (This is very useful for mission mode, because then the AI bots will start shooting each other..... usually).

Sewer Poison:
In the level Sewer their should be two floating platforms and two lights above them, then tell your friend to go in the hole in the middle of the map and hit the two lights as fast as you can, and then the door should close, then green poison will come out and kill your friend. (It's pretty funny because my friend got mad).

Unlock Challenge x15 (10):
Defeat 15 opponents in Challenge Mode.

Unlock Challenge x50 (20):
Defeat 50 opponents in Challenge Mode.

Unlock Combo Unlock x2 (15):
Kill 2 opponents in rapid succession.

Unlock Combo x5 (20):
Kill 5 opponents in rapid succession.

Unlock Complete Mission Mode (20):
Awarded for completing Mission Mode.

Unlock Completed Training (10):
Complete the Single Player training mode with any character.

Unlock Marksmanship (25):
Score over 10,000 in the 'Shooting Range'.

Unlock Mousey McNuts:
Beat him in mission mode with any character.

Unlock Professor Von Brown:
Beat him in mission mode with any character.

Unlock Six Degrees of Small Arms (0):
Play online to 'catch' this elusive Achievement.

Unlock Won 10 Matches (10):
Win 10 matches in Single Player or by playing on Xbox Live.

Unlock Won 100 Matches (25):
Win 100 matches in Mission Mode or Battle Mode.

Unlock Won 50 Matches (15):
Win 50 matches in Single Player or by playing on Xbox Live.

Billy Ray Logg Unlockable:
You must kill Bill Ray in mission mode with any character.