Hmm... I'm a big gamer, so it's very hard for me to pick my top three. So, after a lot of thought:
1. The Elder Scrolls III: Morrowind
2. The Legend of Zelda: Phantom Hourglass
3. StarCraft II: Wings of Liberty
Wishing good luck to everybody's games! It's always fun knowing what people enjoy playing on a Zelda/Pokemon/Darksiders focused forum!