Reviewers Liked
- Challenging cooperative mode extends the story
- Excellent expansion of original concept
- Hilarious writing, voice acting
- Fun cooperative mode
- Terrific writing and voice acting adds two new memorable personalities to the Portal cast
- New environmental elements including hard light bridges and super ability gels create fresh space-time-bending twists
Reviewers Didn't Like
- That it eventually comes to an end
- On the short side
- Limited post-game extras
- Cooperative mode expansions get expensive quickly
- No competitive play
- Loading screens are a bit too frequent
- No Half-Life Easter eggs this time
- Second act is a bit aimless inbetween stages
- New ending theme is no "Still Alive."