Stormbringer and Hawkmoon are great games. They also made a game called simply Elric (not the later Mongoose version), which improved the core system greatly but made significant changes to demon summoning. It was more balanced, but lacked some of the character. Still a great game though. My list of favourite old school games includes Runequest, Ringword, Stormbringer/Elric, Traveller, Chivalry & Sorcery, Aftermath, even the earliest edition of Rolemaster. Later generations of games include Hero Games/Champions, GURPS, Space Master, World of Darkness (for the concepts not the system ugh), Alternity, and Fudge. These days, i mostly play soime variety of Fate or any of a number of indie games which definitely dont qualify as old school games. So, I have played a lot of really old games (that's a partial list, just the ones I've played a lot). But i find most of them are really dated, and could do with incorporating some developments of later generations of games. I'm planning to play a few of them with a couple of friends to show them what older games used to be like, but otherwise, i have no desire to play most of the older games again.