Solid Puzzle Game, short Story, you will spend most of your Time on the Challenge Rooms.
The least Portals and Time Challenges are difficult but possible,
And oh Hell no, the least Steps Challenges are horrible.
So if you like to get all achievements, you can forget that.

Still Recommended if you like to get ♥♥♥♥♥♥♥♥♥♥.

Solid Puzzle Game, short Story, you will spend most of your Time on the Challenge Rooms. The least Portals and Time Challenges are difficult but possible, And oh Hell no, the least Steps Challenges are horrible. So if you like to get all achievements, you can forget that. Still Recommended if you like to get Mindfucked.