Eve of Extinction Cheats

In the second level where you're in Japan After you defeat the guys in
the truck go to the street head straight go to the far side and turn
right way way up on a building you'll see a ley seed go towards it
Limb up the building below it turn right as you get up then go up the
next building walk across the window on the other side you'll see a Notebook
page it unlocks 3 Minute Mode!!!!!

Play the China-town level after getting the Katar. Climb up the Chinese house that has the huge flame on the porch. When you are up there, someone will surprise attack. Kill him and go to the opposite side of the part you climbed up to. Go to the back of the house, but stay on the balcony. Jump to the building on the far side (all the way down, as far as you can see) and look around for another piece of paper. Walk into it, and you will unlock the 3 minute battle mode option.

Beat the game under any difficulty. Save after the credits roll, then reload the saved game to start with a double dagger.

Finish the game using any difficulty setting to get the Survival and 3 minute attack modes.