Tomb Raider: Underworld чит-файл №1

Invincibility:
While playing, hold LT and press A, RT, Y, RT, X, LB.
One hit kills:
While playing, hold LT and press Y, A, Y, X, LB, B.

Reveal enemy health:
While playing, hold LT and press X, B, A, LB, RT, Y.