CheatCodes.com has all the official Steel Reign PSX cheats to unlock everything. If you know of any that we don't have, please let us know.
All published and official codes as of Wednesday May 22, 2013 for Steel Reign are shown below.
At the main menu, press L1, L2, L1, Circle, Square, Circle(2), L2, L1, R2. Now you will have access to a super tank with unlimited weapons and all other tanks.
At the main menu, press L1, L2, L1, L2, R2, R1, Square, Circle, Square(2).
At the main menu, press L2, L1, R2, Circle, Square, Circle(2), L1, L2, L1.
On the third level of Steel Reign get to the docks and move to the edge. There you will find a battle boat that starts shooting cannon shels at you.
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