Cryomancer
Arcane
- We have adaptations from D&D 1 and 2e on late 80s and 90s, all of the long Gold Box series, Dark Sun Shattered Sands, Wake of the Ravager, and even an dark sun mmo, had baldur's gate 1/2, icewind dale 1
- D&D 3(3.5e) received nwn1/2, iwd2 and other adaptations.
- We had some adaptations of vampire the masquarede : redemption and bloodlines, a recent visual novel, and will get vtmb 2 soon.
- D&D 5e got BG3 and Solasta(which is not a D&D product, only uses 5e rules)
- The Call of Cthulhu got a adaptation(not sure if faithful)
I have heard that most GURPS spells are also hard to translate into a CRPG. For eg, a wizard/mage reaches lv 5 and memorizes a fireball on D&D. GURPS is not a game where you learn how to cast fireball. You first learn how to ignite fire, then create fire, then shape fire and only after you can create and shape the fire, you can learn how to make a fireball. All things that you can make with shape fire alone are near impossible to translate into a CRPG. Of course, a GURPS adaptation doesn't need magery. You can even make a ice age campaign on GURPS campaign, but I was reading a little about it and the system seems extremely promising.
For eg, Geyser spell. Requires :: Six Water spells, including Create Spring, and either four Earth spells or four Fire spells
And the "water spell tree"
GURPS seems to have a unique system that can be used on no magic, low magic, mid magic, high magic, from stone age tech to intergalactic sci fi tech, has rules for weapons from a machete to a railgun. Why no game uses this complex and amazing ruleset?