Yes I did.
I can’t remember the specifics of it, but I’m sure it had something to do with falling into a pit trap when you only have 1 HP remaining. This would cause the game to be confused (like maybe you can only be killed by a monster, not a pit trap), and it’d give you a glitched graphic (which stood for infinite, or maybe negative HP) instead of a number to denote how much HP you had left. It’s a shame I was never able to save my infinite HP character – I never fully grasped how exactly you saved stuff on the Spectrum, it was always unreadable when it came to loading the saved stuff up – I don’t think I ever got much further than half-way through the game. I sent the cheat in to a load of gaming magazines at the time (like Sinclair User… man that was an awesome magazine – I loved the Jerry Paris’ cover art era), but it never got printed.
I also loved the board game version and my brother and I used to love nothing more than going on an adventure. I was always the Elf, he was the Barbarian, we used to play the Dungeon Master ourselves by moving the enemies to whoever was nearest. Playing as the DM also meant that we avoided pit traps and knew where all the secret doors were, but hey, it was good fun. We also kept track of how much Gold we found and by the end we had all the weapons (so we could attack at range and diagonally, stuff like that) and armours (so we had extra dice to throw on defending (although we did used to re-roll the dice frequently, just in case!)) – taking this into account, although the board game version didn’t have an infinite HP glitch, we never seemed to fail a Quest…
Such wonderful memories.
