The game also allows players to construct their own story via narrative and reactionary choices, especially if they port their 'Mass Effect' save file. But 'Mass Effect 2' is more than just its roster of heroes.

Every recruitable ally in 'Mass Effect 2' is a layered, complex combination of personality quirks and pitch-perfect writing/voice acting. The game's narrative is a gripping adventure that ramps up the Reaper threat, tugs at heartstrings, and emphasizes characters and their interactions with one another. 'Mass Effect 2' is widely praised as one of the best sci-fi RPGs ever made. What's creepier than a crewmate infested with a mind-controlling worm? A crewmate infested with a mind-controlling worm who is also aware of his actions but unable to stop. And if none of that scares you, the game's legendary voicework will, not just because of how enemies sound but because of what they say.

'System Shock 2' delivers a never-ending sense of dread, thanks to a pitch perfect atmospheric soundscape, spine-tingling lighting, and iconic enemy designs. While combat has also been improved since the first title, the biggest upgrade is in presentation. There's a learning curve, but one that encourages experimentation and making mistakes. If you could sum up 'System Shock 2,' it would be ''System Shock' on steroids.' 'System Shock 2' ups the emphasis on RPG mechanics and, like its predecessor, lets players explore and fight as they see fit. In 'System Shock 2,' players are stuck on a drifting space ship, surrounded by murderous mutants, psychotic cyborgs, and a crippling sense of isolation.

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