Tomb Raider - The Angel of Darkness - Platform: Playstation 1

Handstand on ledge
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Hang from a ledge, then press Up and L1, L2, R1, R2. Lara will do 
a hanstand on the ledge

Persian Ghetto: Unlimited money
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Go into the pawn shop after you talk to the women. After you talk to 
the man in the pawn shop, leave. Then, go straight until you get to a 
sewer drain cover and an object or item toward your left. Pick it up. 
It will be money. Go back to the pawn shop. Then, walk back out of the 
pawn shop. Return to the sewer top where you found the money. There 
will be money there once again. Continue doing this for unlimited money

Unlimited money or items
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Go to any location that you can exit and re-enter easily with money 
or reusable items (health packs, bars, etc.) that can be picked up. 
Keep leaving and entering the screen. The money or item will still 
be there each time.

Swan Dive 
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Press Up, R2, and Circle all at the same time and Lara will do a swan dive.