Excellent mission pack in some of the creepiest gaming locations since Rapture.
Level design and art direction are outstanding as you explore what genuinely feels like a huge base of operations. The sense of scale as you immediately fight inside a massive satellite dish is impressive, and the attention to detail continues in several other locations that feel completely unique from anything you've experienced in ME2.
Overlord tells a solid -- if not terribly original -- story that flows well like an episode of a good TV show, similar to the loyalty missions in ME2. What really elevates the storytelling is the well-timed combat sequences and creepy surprises that keep you on your toes throughout. If you're going to spend some extra money on DLC, it certainly won't go to waste on Overlord. This is a must-play mission if you've enjoyed the base game.