Options:
Ctrl + 1 > Unlimited life
Ctrl + 2 > Unlimited energy
Ctrl + 3 > No bleeding
Ctrl + 4 > No radiation
Ctrl + 5 > No psy
Ctrl + 6 > Unlimited armor
Ctrl + 7 > Unlimited weight
Ctrl + 0 > Unlimited money
Ctrl + 9 > No recoil
Ctrl + 0 > No spread
Alt + 1 > One hit kill
Alt + 2 > Unlimited weapons durability
Alt + 3 > Unlimited ammo
Alt + A > Super jump
Alt + 5 > Show items