Super Contra Cheats

Unlimited Lives and Super Machinegun
On the main menu, select Arcade Game, and then enter the following code:

(Using the D-Pad) [Up], [Up], [Down], [Down], [Left], [Right], [Left], [Right], [B], [A].

If done correctly, the game will start up instead of backing out to the main menu. You will begin with 5 lives that never decrease when killed, and you will have a Super Machinegun weapon equipped at all times!

NOTE: Using this code disables all Achievements and you cannot upload scores to Xbox Live Leaderboards. The code will remain active until you exit the game using the Exit Game option in the pause menu.

Achievements
Complete each achievement to get the allotted gamerscore:

Armory (15): Collect 5 different weapon types.
Elite Soldiers (10): Both players possess a Spread Gun at the same time at some point in the game.
Endurance (10): Both players must complete level 1 without losing lives in an Xbox Live CO-OP game.
Five Levels (30): Complete level 5 in Single Player or Multi-Player mode.
Four Levels (20): Complete level 4 in Single Player mode.
Good Score (20): Reach level 2 with a score of 100,000 or more.
Good Start (10): Complete level 1 in less than 3 minutes.
Master (35): Complete the game using only 1 credit.
Shot Down (15): Destroy the helicopter without dying once.
Team Players (10): Score 300,000 points in an Xbox Live CO-OP game, while still alive.
Three Levels (15): Complete level 3 in Single Player or Multi-Player mode.
Two Levels (10): Complete level 2 while playing an Xbox Live CO-OP game.