Note: The game is also known as Time Crisis: Crisis Zone.
 

Trial mode
Access Trial Mode by finishing both scenarios in Story Mode Special.

Additional Crisis Missions
As your Achievement percentage is raised, the extra Crisis Mission categories will be shown and become available.

Double Gun mode
Achieve over 60% completion to access double gun mode in story mode.

Unlimited ammunition
Achieve over 100% completion to access unlimited ammunition in story mode.

Story Mode Special
Finish both Story Mode scenarios. The Story Mode Special will allow the choice of the machine gun, plus shotgun and handgun, which all can be switched between by simply pulling the trigger while your taking cover.

Grassmarket District
To access the Grassmarket District scenario in story mode, finish the original Garland Square scenario. The Grassmaket District is a PlayStation2 exclusive mission that will follow events six years after the Garland Square scenario.

Hints & Tips

Crisis Missions secret weapons
Kill the opponent in brown body armor that appears for a brief time in the levels below to access the matching 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.

Tiger and Edge
Think of Tiger and Edge to be the toughest Bosses of the main mission, except the Geyser 1 battle with Lynch and his collective backup troops. Tiger has brute strength and can soak up plenty of bullets, while Edge uses acrobatics and speed to dodge shots and catch you off-guard. Obtain a feel for when Tiger will throw or swing objects in the area towards you, and take cover. However, Edge is a greater threat of the two because of his lightning speed. Good players can deflect his Naginatas with accurate shots. You shouldn't have to worry about being double teamed, but if given a choice be more careful of Edge.

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

Suggested zone selection order
Commonly the main mission should adjust difficultyaccording to the player skill, but if you are new to the game or have not played the arcade version, here is the suggested 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 a selection timeout:

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

Zone Bosses
Each zone has its own Boss. Here is a list of zones and the Bosses which are in each:

Drycreek Plaza: M1 Tank
Garland Park: Hind D
Garland Technology Center: Tiger and Edge (URDA Special Agents)
Geyser 1: Derrick Lynch (URDA Leader)
Grassmarket Street: A-0940
Belforte Hotel: Jared Hunter (New Leader) on Jetpack
Crimson Sea: Jared Hunter (New Leader) on Speedboat

Note: The appearance of Derrick Lynch has changed a lot from the arcade version. He has darker skin, a different uniform, and looks more frightening. His main weapon has changed in style, but it still fires like his shotgun did in the arcade.