Hint for #19

You can combine the abilites you get from enemies.

Correct

#18 It released in Japan earlier, and one of them had a different color than the US one.

Pokemon Red/Green/Blue

Yeah. Blue, actually.

The only fighting game on the list. 'SoulCalibur' is without a doubt the best one in the genre, and with a decent margin at that. It is probably the concept of the game that drew me towards the series initially. Instead of the usual 'martial arts' type of fighting, the characters in this series specialize themselves in weapon proficiency. So the fighting will be done with swords and staffs and a couple of fantasy weapons for the most part.

And that works, gameplay is absolutely excellent here. The game came out during the time in which it was still popular in our family to sit around a console playing local-multiplayer. During the peak of this time, we had entire tournaments. Personally, I was always the character "Nightmare" and I got fairly good at it. It's a time that's pretty nostalgic to me, and a time I wouldn't mind coming back.

Besides the fighting, the game had a fun single-player mode where the player must complete missions through fighting, a concept which still holds up today. It was really a game that turned heads when it came out. In fact, I should credit the game's Dreamcast version as being the game that made the PlayStation 2 'unnecessary'. Graphically, it was years ahead of it's time and caused the newer system seem like it wasn't much of an upgrade over the Dreamcast. And I never got it.

20) Pacman?

19) Kirby?

Not really sure :p

Next is a difficult game to guess for a lot of you here, because it's exclusive to Europe.

#18
"[The country] is entirely occupied. Well, not entirely. One small village still holds out against the invaders. And life is not easy for [the garrisons in the forts surrounding it]."

Asterix & Obelix (that part was easy): Kick Buttix (was the best thing I got from a VGC game database search....)?

You are right, I´m pretty sure now you can name both games