The Dragon Quest/Dragon Warrior slime, came from Wizardry! Surprise!
I found out from Escapist Magazine, Wizardry's slime, is Dragon Quest/Dragon Warrior's inspiration, for their slime creatures. I also found out Ultima, by EA's Origin, also was an influential RPG. I wish slime creatures, and Guild Wars 2's Omnomberries, are real, because it will be fun, to meet the slime creatures, and also have some Omnomberries. Thank you.