Excalibur 2555 AD Cheat Codes
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During gameplay press ESC to pause the game, then hold F12 and type in these arrow keys:

[UP]x3 + [LEFT]x5				Full health
[UP]x2 + [LEFT]x2 + [RIGHT]x2 + [LEFT]x2	Full sword power
[UP]x2 + [RIGHT]x2 + [UP]x4			Unlock doors, other than the room you are in 
[LEFT]x1 + [RIGHT]x1 + [LEFT]x1 + [UP]x1 +
[RIGHT]x1 + [UP]x3				Level skip 

Release the F12 key and press the Space Bar to activate.