Aw, I was hoping I could reveal more and more awesome details :'(
Fine, take it away!
The game was a fine more involved Gauntlet - an ancestor of ARPG in other words - but the mind blowing parts to our little group was two-fold.
First, you could summon a golemn that would wander aroudn kicking ass, how awesome is that!
And then, another player could grab another joystick, and he could actually control it!