Starting the game
Disc: cycle through gameplay options
Side keys: choose selected option
Exploring
Disc: move through maze
Top side keys: fire projectile weapon; use item in hand
Bottom-left side key: enter pack mode
Bottom-right side key: enter pack mode
Pack
Disc: move cursor
Top side keys: use selected item; open doors; descend stairs; activate and toggle status display; exit pack mode (by selecting spot #2 in inventory)
Bottom-left side key: drop item on ground
Bottom-right side key: select weapon; exit pack mode (by selecting blank spot in inventory)
Battle
Disc: move toward/away from enemy; move cursor when selecting items in pack
Top side keys: swing weapon; use item in pack
Bottom-left side key: open pack to bribe monster with item
Bottom-right side key: open pack to select weapon
The Intellivision keypad is unused in Tower of Doom, with one exception: press 1 and 9 together to pause the game.