Arthur's Magical Cypher
The code wheel is used to give health bonuses in the game. As with most Electronics Arts disk there was copy protection in the disk called Pirateslayer.
This is scan of original US release for Commodore 64 with blue colored code wheel.
Thanks to ~ Rekrul for this code wheel reproduction & Steverd from www.c64copyprotection.com.
Demon Stalkers: The Raid on Doomfane can be played in either single player mode or two player co-operative mode, using two joysticks, or a joystick plus keyboard. Players can choose to control either the hero, armed with throwing knives, or the heroine, armed with a crossbow. During the game, players will find various relics which permanently increase attack power, defense, or magic power, as well as an arsenal of magic scrolls, and special amulets that create temporary effects. Food can be picked up to heal damage, but occasionally turns out to be poison which hurts the player. Similarly, some scrolls turn out to be a "slow death curse," which takes a way the player's health continuously until death, unless the exit from that level is found. Enemies in the game include rats, ghosts who can walk through walls, dervishes who can steal a player's possessions, snappers who remain dormant until disturbed, and mad mages, who shoot fireballs. These monsters emerge from special spawning areas called vortexes, which can be destroyed by the player with several shots, except for the rats, who emerge from indestructible sewer grates.