Recs.
Updated
Mass Effect 2 is a sci-fi action role-playing game set across planets in the Milky Way. You play as your own customized Commander Shepard, leading your ship and your squad to save the galaxy from the Collectors.
SpecsUpdate
Pros
Pro Memorable cast of authentic characters
Mass Effect 2 has an amazing cast of both human and alien characters who feel like real people. While just about any NPC you meet is fantastic, your squad members are the ones that stand out the most. You have about ten squadmates to choose from, not including DLC characters. They all have backstories and traits that are believable and natural. Their personalities shine through the most during their optional loyalty missions where you help them complete certain personal tasks separate from the main story.
One of your human squadmates, Miranda, is cold and intimidating at first, since she distrusts you for her own reasons. Her loyalty mission is unexpectedly emotional, showing Miranda as more flawed and caring than she lets on. There's also Garrus, one of your returning squadmates from the first Mass Effect. He's a turian that looks somewhat bird-like in design, but his easygoing personality is very cool, making him feel relatable and reliable. His loyalty mission shows his darker side as you help him tie up loose ends from his past.
Getting to know everyone through dialogue and squad banter is a lot of fun, making it easy to grow attached to your favorite characters.
Pro Your choices have true consequences on the story
Your choices have direct consequences on how the story plays out, not only in this game but also across the rest of the Mass Effect trilogy. In Mass Effect 2, you get to choose between options like keeping or destroying inhumane scientific research that could help an entire galactic race, or exposing the dark truth about a squadmates' family for the greater good or keeping it hidden. Who you bring along for the final mission and how you lead your team has a huge impact on the ending. Each of your decisions, big and small, carry over into Mass Effect 3, opening things up for many different playthroughs to see how things turn out with other choices.
Cons
Con Levels are very linear
Mass Effect 2's levels are more like winding corridors with the occasional wide open space here and there. You always have a clear sense of where to go next, but there isn't much room for exploration. It's also obvious when enemies are about to show up, since you'll come to a place with a bunch of chest-high walls conveniently spread around the area for you to take cover behind. It's unimaginative, making missions feel like you're only going from point A to B.
Con The main enemies, the Collectors, feel misplaced in the trilogy
The Mass Effect trilogy's story is about stopping the Reapers -- ancient, unknowable beings who destroy all life -- but this gets interrupted in Mass Effect 2 by the Collectors who are more like minions of the Reapers. The Collectors are dangerous because they harvest humans, though this is not as important as the Reapers who seek to end all life in the galaxy in Mass Effect 3. It would have made sense for Mass Effect 2 to focus on the Reapers instead of the Collectors, since they're more of a secondary problem.