Spy Hunter 2 Cheats & Tips

Below is a list of the rewards you get for completing the levels:
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Beat Level 1: get level 2.

Beat level 2: get level 3.

Beat level 3: get Dual Purpose Rockets and level 4.

Beat level 4: get Seeker Missiles, Light Armor, and level 5.

Beat level 5: get Smoke Screen and level 6.

Beat level 6: get Laser Cannon, Shield, and level 7.

Beat level 7: get Gatling Gun and level 8.

Beat level 8: get Missile and level 9.

Beat level 9: get Rockets and level 10.

Beat level 10: get Cluster Missiles, better Shileds, and level 11.

Beat level 11: get Firebolt Missile, Oil Dispenser, and level 12.

Beat level 12: get better Cannon and level 13.

Beat level 13: get Laser weapon, Heavy Armor, and level 14.

Beat level 14: get better Cluster Missiles and level 15.

Beat level 15: get Anti-Armor Rockets and level 16.

Beat level 16: get best Cannon and level 17.

Beat level 17: get best Cluster Missiles, Self-Repairing Armor, and level 18.

Beat level 18: you've beaten the game.
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Invincibility
Pause the game, then press L1, L1, L1, R2, L1, R1, R1, L1, R2.

Infinite Ammo
Pause the game, then press R1, L1, R2, R2, L2, R1, L1, R2, L2.

All Missions and Weapons
At the main menu, press L1, R2, L2, R1, R1, L2, R2, L1.