All Working Time Crisis: Crisis Zone Cheats - Playstation 2

Story Mode Special
Complete both Story Mode scenarios. Story Mode Special allows choice of the machine gun, plus shotgun and handgun, which all can be switched between by pulling the trigger while taking cover.

Grassmarket District
To unlock the Grassmarket District scenario in story mode, complete the original Garland Square scenario. Grassmaket District is a PlayStation2 exclusive mission that follows events six years after the Garland Square scenario.

Double Gun mode
Get over 60% completion to unlock double gun mode in story mode.

Additional Crisis Missions
As your Achievement percentage increases (by unlocking various features and progressing through them), the additional Crisis Mission categories will be revealed and become available.

Recommended zone selection order
Generally, the main mission (Garland Square) should adjust difficulty to according to player skill, but if you are new to the game or have not played the arcade version, here is the recommended order in which you should select the zones, with the least challenging first, and most challenging last. This also seems to be the main default order that the game chooses on selection timeout:

Drycreek Plaza (Easy)
Garland Park (Medium)
Garland Technology Center (Hard)

Increasing lives and credits
Completion of Story Modes will normally gain you one Life and Credit. This is shown by a screen following completion, indicating what you have gained/unlocked in the game. Note that losing the game by running out of Credits can also gain you a Life/Credit. Note that you can change the number of Credits you start with in addition to Life, in the game settings.

Crisis Missions secret weapons
Kill the opponent in brown body armor that appears for a short time in the following levels to unlock the corresponding weapon.

Flame thrower: Drycreek Plaza; in the store room
Gatling gun: Grassmarket Street; in the first open area
Grenade launcher; Belforte Hotel
Laser rifle: Garland Technology Center; the room with the automatic gun turrets
Missile launcher: Garland Park; among the STF trucks.