La-Mulana, for being an idea blend of metroidvania and zelda. I also like many visual novels, as they offer the substance of book, with visual and audio supplements to make the experience immersive. The very best of these, such as Snatcher, Phoenix Wright, or Grisaia take it to the next level.

Witcher 3 for the obvious one.

Spellforce for the hidden gem one.

Volgarr the Viking.