Asheron's Call
Asherons Cal was one of the most challanging mmogames out there. I have played many games since and only vanguard has come close to AC in fun factor, but AC is still on top when it comes to reward for your grinding. No game ever has had as good reward system for killing suff with the random made loot. The only thing similar in Asheron's Call that is in other MMORPGS are the existance of quests. There are no classes, no instances except for half a dozen duplicate dungeons. No zones; pick a direction and start running.
The nice thing about AC is player skill plays into the game a lot, which means that as you're leveling up your ability to dodge spells/missles and knowing how to fight different monsters plays in as much as your level and gear do. You can repeat just about any quest in the game, they have different timers, which means no missing out on the ones you enjoyed like most MMOs where you run each quest once on your way up and aren't allowed to again. The pvp is amazing, and frustrating. It is a wild mix of twitch and charcter build/equipment. You can sidestep someone's fireball or arrow, you can duck behind walls, jump onto rooftops, run. On Darktide the pvp is free for all and you get to loot your enemy when you kill him.
