I'm going to stick with the PC with my list of underhyped gems

Beyond Good and Evil

Chronicles of Riddick

Vampire the Masqurade: Redemption & Bloodlines

Nexus the Jupiter Incident

Tribes 2

The Movies

Spellforce and all its expansions

SiN

SiN: Episode 1: Emergence

 Sacrifice

Armies of Exigo

Evil Genius

These come to mind.