Cheat mode
Enter the Goals/Notes/Images screen. Press L2, R2, L1, R1, Start(3) to display another tab on this screen with the following options:

God
Full Health
Full Energy
Full Ammo
Full Mods
All Skills
Full Credits
Tantalus
*** Some options may need to be re-enabled after entering a new area.

PS2 Cheats for Deus Ex

Deus Ex cheat codes

Deus Ex cheats