To unlock the cheats press !!!@@@###. You can't use them in multi-player mode. Also for the final points your total will be 0 and it will say "cheats".
Build Faster
Activate cheats and press z
Full Map
Activate cheats and press m
Full prayer meter
Activate cheats and press =
Get 40 hp
Activate cheats and press [
Immortal King
Activate cheats and press u
Technology Abilities
Activate cheats and press t. Press it 3 times for all possible technology.