Most difficult game you played

[caravel]

Yes, Another World... I seem to remember playing that on the Amiga for a short time before giving up. IMHO the original Prince of Persia (1989/1990) was one of the hardest games there is. You had to finish the whole game in an hour and you could only save at the start of each level... it was also one of those slidy inertia type, collapsing platforms and spike pits games - very frustrating... I'm pretty sure I didn't get past the first level...

The Alien section of the Alien versus Predator Gold

I read somewhere that very few people ever completed the whole game and to this day I still have only completed the Predator and Marine sections, it was just way too confusing and disorienting running up walls etc.

I had the normal version of the game (AvP 1999), not the gold version, but completed the whole game with all three characters on the "Director's Cut" difficulty. The alien is hard to master yes, but if you're conservative with your limited save points and master wall walking (and patience) it's very doable. The trick is to use the xenomorph's speed to your advantage, i.e. wait and strike multiple targets before they can fire their weapons - something which wasn't really possible with the clumsy slowed down xenomorph in AvP2.