Fallout: New Vegas
Obsidian has clearly spent all their time and energy on the story and characters instead of on the game engine, but it is a trade off that long time Fallout fans might appreciate. While this game could have been awesome as a full blown sequel on a new engine, it still works great and comes highly recommended to all Fallout fans.
Gameplay: Despite some annoying bugs the gameplay still shines.
Graphics: The Gamebryo engine still has its moments but is really starting to show its age.
Sound: Good stuff