The successor to the surprise genius found in Valve's Orange Box, Portal 2 is a triumph; An excellently designed puzzle game that has no peer. The various tools and elements required to solve each puzzle increase in difficulty at a perfect pace, and then just as you start to tire of one particular thing, you are introduced to a fresh game mechanic that mixes up the entire formula. The signature dark, dry humor of the first game returns with a flourish, topped with delightful characters who will have you laughing every step of the way. Whenever you open a "greatest games list" in the next twenty years, Portal 2 will be in the top ten.
There really isn't anything else that needs to be said.
