F1 - God Mode
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Enabling this option makes you invulnerable. The only way you can die, however, is falling from heights or throwing yourself in pits..
F2 - 1 Hit Kill
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As the name says it, enable the option, enter a fight, and hit your foe one time. Instant death !
F3 - All Weapons
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Want to have access to all weapons? No problem, this option gives you all weapons, including special (upgraded) ones. Reload of your currently save game is usually required for the weapons to be added to your inventory.
F4 - Unlimited Ammo
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Don't want to worry about the ammo? Then you'll love this option. This will also give you unlimited medkits.
F5 - Unlimited Oxygen
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Sick of choking underwater? No problem. Enable this option..
F6 - Toggle Speed
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This option will allow you to travel with a faster-than-regular speed. It can be increased, but then you won't be able to play the game properly :D
F7 - Save Position
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As name says it, stop in a spot - let's say right before a tricky jump - and hit F7. Try to jump, and if you see you didn't make it through - half-way through, not when dead - hit F8 to get yourself back @ the saved position ;)
F8 - Load Position
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Considering you saved at least one position, use this key to return Lara to it ;)
Note: Load Position option won't work through walls. So, when saving a spot, make sure you're out in the open, or you won't be able to get Lara teleported back to where you saved you coords ;)
F9 - Freeze Level Timer
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You can now play Time Trial without really having to worry about the time :)
F10 - Wear Sunglasses
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We all know Lara looks awesome, but she sure looks even better with sunglasses on.

There are two versions depending on the version of the game specified by file size. You can verify this by going to the folder where Tomb Raider Anniversary is installed on your computer, right click on the file tra.exe and select Properties.

Warning: some antiviruses detect the trainers as viruses because they alter memory directly. This is just a false positive, the trainers are safe to use, it is just the way trainers work.

Trainer file size: 130KB.
Are you looking for the first version (+8) of the trainer? Check out this page.
Tip: Is the trainer not working or you have ideas about new features? Use the contact form to let us know.