Here are some cheats and tips for the game X-Guard.
Level Password
1 FIRST
2 TIMEWARP
3 VOYAGE
4 STARFIELD
5 PRISON
6 FORTRESS
7 NEUTRAL
8 MORTALITY
9 OPERATION
10 TRANSPORT
11 FLOODGATE
12 NEXUS
13 TITAN
14 WRATH
15 REVENGE