1853 Wild West level rewards:
1920 Aztec Ruins level rewards:
1972 Atom Smasher level rewards:
2019 NeoTokyo level rewards:
2280 Return to Planet X level rewards:
Arcade Adios Amigos level rewards:
Challenge Pane In The Neck level rewards:
Ending bonuses:
Hidden mini-games:
Hint: Faster reloads:
Hint: Destroying the Bio-Hazard case:
Successfully complete the level in story mode under the medium difficulty setting to unlock The Colonel as a playable character in arcade mode.
Successfully complete the level in story mode under the medium difficulty setting to unlock Stone Golem as a playable character in arcade mode.
Successfully complete the level in story mode under the medium difficulty setting to unlock Khallos as a playable character in arcade mode.
Successfully complete the level in story mode under the medium difficulty setting to unlock Sadako as a playable character in arcade mode.
Successfully complete the level in story mode under the medium difficulty setting to unlock Ozor Mox as a playable character in arcade mode.
Successfully complete the level with a "Gold" rank to unlock Hector Babasco and Lean Molly as playable characters in arcade mode.
Successfully complete the challenge with a "Silver" rank to unlock the Rotating Heads cheat.
Successfully complete the game under the easy difficulty setting to unlock the Cardboard Characters cheat and Streets level in arcade mode.
When using the Temporal Link, press Triangle while using the link to open a set of mini-games, such as Snake.
Some guns have slower reload times than others. Instead of pressing Reload, press Next Weapon quickly followed by Previous Weapon (or vice versa). When you switch to a new weapon and go back to it, the weapon will automatically be reloaded.
When you restore the power in the building, go down to the "Digging Site". When you get there, you will see a case with something in it. Make sure you have plenty of Timed Mines. Walk towards it and throw four or five Timed Mines at it then run away. When it blows up, the woman on the speaker will start talking. People with very good guns (Flame Thrower, Shotgun, Machine Guns, etc.) will appear. You will also have a new objective to not let any mutants survive.
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