A neat one is
"AlphaMan". (Absolutely no speed problems)
You're a mutant in a future wasteland, and have to fight your way through forests & explore buildings & stuff.
You get 2 random mutant powers at the start to keep things different.
The thing I like best is that all of the hightechtoys & most items are given nonsense names until you figure them out.
You have to fiddle around with the "Large Metal Object" for a while before you figure out that its a hovercraft.
(And the names are randomized each game, so you can't memorize it

)
I'd love to have that sort of thing in SE4, where players don't know what each tech area will provide until they've figured out the prerequisite techs.
[ 08 January 2002: Message edited by: suicide_junkie ]