Trainer options:
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F1 – Invulnerability
F2 – Unlimited Armor
F3 – Unlimited Kill-rush
F4 – Unlimited Ammo
F5 – Unlimited Grenades
F6 – No Recoil
F7 – Dual Weapons
F8 – Switch Weapon
F9 – Switch Grenade

Additional information:
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You may have to re-activate some options after a level-change.

F7 – Dual Weapons:
You cannot enable dual-weapons on these weapons:

Knife
Sword
Baseball Bat
Crowbar

F8 – Switch Weapon:
Changes your currently selected weapon to the next on the list:

Semi-Auto (Beretta)
Silenced Pistol
.50 Caliber (Desert Eagle)
Revolver (SW357)
Assault Rifle (AK47)
Automatic Rifle (Colt M16)
Sniper Rifle
Machine Pistol (MAC10)
SMG (UZI)
Shotgun (Mossberg)
Sawn-Off
Knife
Sword
Baseball Bat
Crowbar

F9 – Switch Grenade:
Changes your grenades to the next type on the list:

Grenade
Molotov
Pipe Bomb

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