# Full health

Pause the game and press L1, R2, L2, R1, Up(2), Left, Square, Right, Circle, Start.
# Shrink Jamgut

Pause the game and press R2(2), Circle, R2, L2(2), Left, L2, Triangle.
# Bonus gallery

At the main menu, press Triangle, Up, Circle, Right, Down(2), Square, Left. Repeat this code to unlock more bonus gallery entries.
# Alternate ending

Successfully complete the game after saving all 260 natives to view an alternate cliffhanger-type ending.
# Move Kya's head

Whenever Kya crosses her arms when talking to anyone, hold X and move the Left Analog-stick. She will move her head in the direction that you move.