Oops sorry forgot to write Demonicon, yes I have it and finished it.
The interesting thing worth mentioning is that all those TDE RPGs use completely different style. Under the hud, of course, is a certain version of TDE rules adapted for a game. However:
Drakensang - pausebased RT combat with save anytime option, even in the middle of the fight, abnormally slow movement through areas (exploration exists), many skills covered, max party of 4+1+1 (4 party NPCs, one quest related in some areas and one summon), many different followers to choose from, many race/profession options
Blackguards - TB combat with save only outside of a battle, instant movement through areas (no exploration), removed completely noncombat skills like pickpocket or seduce, max party of 5, predefined followers you can't choose from a pool, only 3 basic professions
Demonicon - RT combat with save only on checkpoints, fast movement through areas with (exploration exists), just a few noncombat skills like lockpick, no strategizing with party setup as there is none
I won't say which game of those three applied the best of TDE ruleset, but it's absolutely amazing you can do so many different things with a ruleset. Can't wait to see in which direction RoA remake went.