Overlord, the latest and largest of the Mass Effect DLC packs, is a mixed bag in the best possible way. It's a medium-sized adventure that never lets one gameplay element dominate for too long, leavening the expected duck-and-cover combat with openworld exploration and a dash of environmental puzzling, all wrapped up in a story that builds to a satisfying and pathos-heavy finale. It is almost exactly what you want from a low-priced downloadable add-on.
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Where the DLC drops the ball is in the way your characters react to what happens, or rather don't react. At all. Shepherd gets dialogue in a handful of new cut-scenes, but with 12 potential companions to cater for, there clearly wasn't any budget for new voiceover work in-game.
While that may be understandable from a practical development standpoint, it's a noticeable omission as a player. The circumstances of the ending are such that characters like Jack, Mordin and Legion would certainly have something to say, but seeing them standing mute reminds you that they're just digital puppets, not the fleshed-out characters of the main game's storyline.
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