The first bit of GURPS to see release was the combat system.
Tag: Gurps
GURPS (1987)
The second edition box set.
Transhuman Space (2002)
A science fiction setting for GURPS that aims for plausible realism, and often hits the mark.
GURPS Creature of the Night (1993)
A pretty limp GURP.
GURPS Mage: The Ascension (1994)
By all accounts, a disaster of the game. You can still find message board flamewars between the designers out there…
GURPS Werewolf: The Apocalypse (1993)
Also a pretty good adaptation that solves the power differential between vampires and werewolves.
GURPS Vampire: The Masquerade Companion (1994)
Any issues from the corebook are ironed out here, and the whole game is nicely expanded.
GURPS Vampire: The Masquerade (1993)
Shockingly, this GURPS conversion works pretty well.