: The game expertly introduces new mechanics—like propulsion , repulsion , and conversion gels —gradually enough to avoid frustration but frequently enough to keep the gameplay fresh.
: The separate co-op campaign isn't just a side mode; it features unique puzzles that require two people to think with four portals simultaneously to solve. Critical Perspectives ABOUT Portal 2
: The humor is legendary, driven by phenomenal voice acting from Ellen McLain (GLaDOS), Stephen Merchant (Wheatley), and J.K. Simmons (Cave Johnson). Stephen Merchant (Wheatley)
: Players explore the decaying ruins of Aperture Science, which tells a silent story of the facility's ambitious but unhinged history through detailed environments. ABOUT Portal 2