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XBox - Dragons Lair 3D cheats

Unlock reward menu:
Go to the main menu and press the following button combinations on your 
Xbox controller:

Press R + click Left Analog-stick, then
press R + click Right Analog-stick, then 
press R + click Left Analog-stick, then 
press R + click Right Analog-stick, then 
press R + White, R + Black, R + White, R + Black.

Choose the "Start Game" option. Now you can access to the following 
options in the reward menu:

Continuous Fire Sword
No Rewards
Pencil Test Characters
Smooth and Shaded Characters
Sword Time
Unlimited Mana