This game has everything to be great. The pitch is great, the puzles are fun, the only character in the game is very funny. However, you can just feel that the game doesn't deploy its full potential. Just by playing the bonus rooms, you realise how little the base game exploits its mechanics, and relies a bit too much on the "fast thing comes in, fast thing comes out" mechanic, even though there were a hundred different ways to use the portal mechanic. Plus, the last trunk of the game dragged for too long.

However, the one thing this game suprised me with was its eery ambiance. The writings on the wall you can find behind the test room, the weird jokes made by GladOs, all lead you to believe that something is wrong.

This game was made to have a sequel, because of how under-exploited it feels, but it perfectly mixes humour and horror.