Most games with "Dark Eye" in the title are not adventures. They are mostly RPG's and most aren't all that related to each other except in that they take place in the "Dark Eye universe." For example this one
http://en.wikipedia.org/wiki/The_Dark_Eye:_Demonicon
"Dark Eye" also refers to an RPG ruleset, described here
http://en.wikipedia.org/wiki/The_Dark_Eye"Dark Eye: Chains of Satinav" and "Dark Eye: Memoria" are the only games in the adventure game series you're thinking of.
The only other "Dark Eye" game that is an adventure is an unrelated game from 1995, called "The Dark Eye," and which is a horror game based on some of the works of Edgar Allan Poe.
http://www.mobygames.com/game/dark-eye