Paint Ball

Beat The Dam as a secret agent within 2:40.

Invincibility

Beat The Facility as a 00 agent within 2:05. This is close to impossible.

 DK Mode

Beat The Runway as an agent within 5:00.

 Double Grenade Launchers

Beat The Surface as a secret agent within 3:30.

 Double Rocket Launchers

Beat The Bunker as a 00 agent within 4:00.

 Fast Mode

Beat Launch Silo as an agent within 3:00.

No Radar (Multi)

Beat The Frigate as a secret agent within 4:30. This is an absolute must.

 Tiny Bond

Beat The Surface the second time as a 00 agent within 4:15.

 Double Throwing Knives

Beat The Bunker the second time as an agent within 1:30.

Fast Animation

Beat Statue Park as a secret agent within 3:15.

 Invisible

Beat Archives as a 00 agent within 1:20.

 All Enemies with Rockets

Beat Streets as an agent within 1:45.

Slow Animation

Beat Depot as a secret agent within 1:40.

 Silver PP7

Beat Train as a 00 agent within 5:25. This is next to impossible.

 Double Hunting Knives

Beat Jungle as an agent within 3:45.

 Infinite Ammo

Beat Control as a secret agent within 10:00.

 Double RC-P90s

Beat Caverns as a 00 agent within 9:30.

 Gold PP7/Cougar Magnum

Beat The Cradle as an agent within 2:15 for a Gold PP7. If you're over, you get a Cougar Magnum.

 Double Lasers/Lasers

Beat Aztec as a secret agent within 9:00 for double lasers. If you're over, you get a single laser.

 All Guns/Golden Gun

Beat Egypt as a 00 agent within 6:00 for all gun mode. If you're over, you get the Golden Gun.