Assassin's Creed (Series)!

The Dark Mod is a FREE, first-person stealth game inspired by the original Thief series by Looking Glass Studios. In it you play a hooded figure slinking through the shadows of a gothic steampunk city, hunting priceless valuables while avoiding the swords and arrows of those hired to stop you.

Open source Elderscrolls 3: Morrowind engine re-implementation.

Kingdoms of Amalur features "5 distinct regions... 4 playable races, and 3 class trees with 22 abilities per tree." The four playable races are the Almain (Civilized Humans), the Dokkalfar (Dark Elves), the Ljosalfar (Light Elves), and the Varani (Nomadic Humans). The player starts off as a "blank slate", but can afterwards choose a class among the three available (can respec once per Fateweaver).

Are you afraid of the big bad Woolfe? Step into the boots of a vengeful Red Riding Hood in this twisted-fairytale platformer. Defeat deranged fairytale bosses with your trusty axe, explore a gorgeous fantasy universe and piece together the truth behind the mysterious passing of Red’s father