Using this Trainer:
Launch the trainer first, then launch the Game and then Press F1 at the Main Menu.
Listen for "Activated".
Press desired option key
Options in Promo:
\ Key: Super Zoom (2 Modes)
Numpad 1: Unlimited Health
Numpad 2: Unlimited Energy
Numpad 3: Super Speed
Numpad 4: Super Jump
Numpad 5: Tactical Synergy Mode
Numpad 6: Tactical Stealth
Numpad 7: Super Troop Damage
Numpad 8: Unlimited Ammo/Items
Numpad 9: No Reload
Numpad 0: Easy Upgrades
Numpad /: Ultimate Invisibilty
Numpad *: Unlimited Weapons
[ Key: Super Accuracy
] Key: No Recoil
\ Key: Super Zoom (2 Modes)
, Key: Save Position
. Key: Teleport
/ Key: Undo Teleport
Numpad .: Hover Mode
Numpad +: Float Up
Numpad -: Float Down
L Key: Clip Mode
Arrow Up: Clip North
Arrow Down: Clip South
Arrow Left: Clip West
Arrow Right: Clip East
AS ALWAYS, PLEASE BACK UP YOUR SAVE GAMES! USE OPTIONS WHEN NEEDED AND TURN THEM OFF WHEN NOT NEEDED, ESPECIALLY WHILE LOADING MAPS OR BETWEEN LEVELS!
Numpad 1: Unlimited Health - toggle this on to prevent death from gunfire, falls, and several other damage types. This will not prevent scripted deaths or moving into areas where death is automatic.
Numpad 2: Unlimited Energy - toggle this on to prevent your energy level from dropping. While Tactical Stealth mode is active, your energy might appear to drop even with this option on, but if this option is on your energy is full at all times.
Numpad 3: Super Speed - toggle this on and off for super speed while in suit.
Numpad 4: Super Jump - toggle this on and off for super jump ability while in suit.
Numpad 5: Tactical Synergy Mode - this mode gives you the ability to activate all three modes of your suit at once. Instructions are very important. First, activate your STEALTH mode, then activate this option. Next, activate the VISOR mode, then press the 1 Key to bring up your weapon. Next, press the ARMOR mode key and you will have STEALTH activated, VISOR activated, the ability to shoot weapons, and the POWER mode ALL active at once. Firing weapons in this mode will not reset your stealth. You can use any combination of MODES while this option is activated, just make sure to activate STEALTH option FIRST before enabling the option if you want it to be active while this option is on. Also use the ARMOR option last if you wish to use it while this option is on.
Numpad 6: Tactical Stealth - this option allows you to fire your weapon while in STEALTH mode. IF you have Tactical Synergy Mode going, then you won't need to activate this. Make sure that Tactical Synergy Mode is off, and then enter STEALTH mode. Next, press this key to lock STEALTH mode and allow you to fire weapons while stealthed. This option is different than Tactical Synergy Mode in that it is mostly useful for keeping your weapon ability to shoot while STEALTHED. Your Energy bar will still go to 0 while in this mode, although if the Unlimited Energy option is on, it will only APPEAR to have dropped to 0. This option automatically turns off Tactical Synergy Mode. USe this option instead of Tactical Synergy Mode to play the game more faithfully as it was intended, with the exception of being able to fire your weapon without uncloaking.
Numpad 7: Super Troop Damage - any damage to non-player NPC's will kill them instantly. You might need to turn this off in missions that require certain NPC's to survive. May not work with all NPC's/enemies.
Numpad 8: Unlimited Ammo/items - turn this on and when you fire or reload your weapon will instantly have the maximum ammo for that item/weapon. May not work with all items.
Numpad 9: No Reload - turn this on and when you fire your weapon you will have a huge clip of ammo inside the weapon, ready to fire. You effectively will not have to reload. NOTE, if you have the rocket launcher and it has 'bugged out' and you cannot drop it, hold the CTRL key and press this option. You will hear 'activated'. The scroll to the Rocket Launcher and press the fire button and reload key repeatedly until you drop the rocket launcher. Hold the CTRL key again and press this option and you will hear 'deactivated'. The rocket launcher can only be fired twice, whether this option is ON or OFF.
Numpad 0: Easy Upgrades - turn this on and press 'H' to enter the Upgrades section. The cost of upgrades will be -100,000. You can buy anything AND it will add nano points each time you buy something. You MUST have 'some' Nano Points that you picked up from Alien bodies first.
Numpad /: Ultimate Invisibilty - this is the ultimate in stealth. Activate this option and enemies cannot see you. They might hear you or react to your actions but they cannot see you and likely will not fire upon you. Leaving this on during loading levels might break certain AI scripts and cause enemies to be frozen or not move. Turn on when needed and turn back off when not needed.
Numpad *: Unlimited Weapons - this option allows you to pick up as many weapons and certain items as you would like. You can carry a massive arsenal of weapons instead of the usual two as well as certain other items.
[ Key: Super Accuracy - the current equipped weapon will have a very focused crosshair and your shots will be pinpoint perfect, even while moving or jumping. May not work on all weapons.
] Key: No Recoil - the current equipped weapon will not recoil when fired, allowing you to precisely aim and fire without the weapon kicking your aim. May not work with all weapons.
\ Key: Super Zoom (2 Modes) - press this key to Zoom your view closer. Press again to zoom even closer. Press a third time to reset the view to normal.
, Key: Save Position - saves your current physical position in the current level. . Key: Teleport - teleports your character to the saved position.
/ Key: Undo Teleport - undo the teleport.
Numpad .: Hover Mode - press this key and it will keep you from falling. You can use this to float around or across areas. Turn off to re-enable falling.
Numpad +: Float Up - press this key to move your character upwards. Any movement will make you fall down unless Hover Mode is activated. You can force your character upward through roofs and etc.
Numpad -: Float Down - press this key to force your character downwards. You can move through floors. Make sure you do not force yourself through the bottom of the map level. Any movement will make you fall if you are above a ground plane.
L Key: Clip Mode - press this key to allow the CLIP options below. Clipping allows you to move through doors, building walls, and obstacles. Use these options and the Float options to put your character into otherwise impossible locations.
Arrow Up: Clip North - press this key to move your character directly north, passing through any walls or objects. Take note that direct north may not be the direction you are facing, nor will it necessarily match the mini-map directional.
Arrow Down: Clip South - press this key to move your character directly south, passing through any walls or objects. Take note that direct south may not be the direction you are facing, nor will it necessarily match the mini-map directional.
Arrow Left: Clip West - press this key to move your character directly west, passing through any walls or objects. Take note that direct west may not be the direction you are facing, nor will it necessarily match the mini-map directional.
Arrow Right: Clip East - press this key to move your character directly east, passing through any walls or objects. Take note that direct east may not be the direction you are facing, nor will it necessarily match the mini-map directional.
Unlock more trainer options including updates from here - Crysis 2 Trainer