Ghost Squad Cheats

Party Modes
Here's how you unlock the two extra Party Mode games:

Ninja Mode: Clear Arcade Mode once
Paradise Mode: Clear Ninja Mode once

Costume Levels
To unlock a new costume, simply reach the required level on single-player mode. The first two costumes are already unlocked.

Cowboy: Reach level 23
Desert Camo: Reach level 07
Future Warrior: Reach level 38
Gold Uniform: Reach level 99
Ninja: Reach level 50
Panda Suit: Reach level 60
Policeman: Reach level 10
Sky Camo: Reach level 18

Unlock Weapons
Unlock these weapons by reaching the appropriate level in arcade mode:

ABG1: Level 43
AR4A: Level 32
CAC82: Level 07
CPG7: Level 50
G50: Level 54
Guardian I: Level 60
Guardian II: Level 34
M209: Level 61
M45R: Level 19
M4E: Level 02
M94R: Level 30
MP10: Level 77
P44M: Level 05
P4512: Level 40
PM6: Level 26
SAW24: Level 15
SG112: Level 93
SPR11: Level 23
SPR3: Level 69
SR308: Level 85
TK1B: Level 46
TM9V: Level 11
TR14: Level 38
XM-2119: Level 01
XMW21: Level 99