Baldur's Gate: Dark Alliance:
Cheat Menu:
Hold LEFT TRIGGER + RIGHT TRIGGER + X + Y + A + B, Press START to unlock the Invulnerabilty and Level Warp menu.
Level-Up:
Hold LEFT TRIGGER + RIGHT TRIGGER + Y + A + B + X, Press WHITE.
Invincibility and Level Warp:
Hold L all of the way down, press R half-way down with Y, A, Left stick Right, and then press Start.
This will unlock invincibility and level warp.
Unlock Gauntlet:
Complete the game on any difficulty setting to unlock the Gauntlet.
Unlock Extreme Difficulty:
Complete the Gauntlet to unlock Extreme Difficulty.
Unlock Drizzt:
Complete the game on Extreme Difficulty to unlock Drizzt.
All Spells / Abilities:
During gameplay, press and hold L, and press R+Y+A. This will give you all spells and abilities.