All of these games take place in the world of Aarklash and/or the city of Cadwallon:
Confrontation was the original skirmish scale miniatures game published by Rackham which were metal.
Confrontation Age of Rag'narok was the pre-painted plastic miniatures game that was army scale and was not very well received. It was published after Rackham was acquired and became Rackham Entertainment.
Cadwallon RPG was a tactical role playing game that was pubished by Rackham in French and English. It had a hefty players handbook that was hardback. The only English language supplement was Secrets Volume 1. Volume 2 was published in French only. Volume 3 was written, but none of the writers got paid, same thing with the large Adventure that was written, it is still unpublished. It also had a gm screen and several tile board sets. It heavily featured the miniatures from confrontation and had its own line as well.
Hybrid and its supplement Nemesis were tactical board games which used the miniatures and took place in the laboratories of the Scorpion.