If you have played the first game of Portal, Portal 2 will deal you no dissapointment, Valve have done a stunning job with every little detail in this game, till it was as complete, and utterly perfected as it has turned out to be.

You'll be seeing tons of storyline, shot into your head like drugs into veins as you pass through the furtermore testings of the fearsome GLaDOS, the game is in no way repetitive, the puzzles are difficult yet very unique from eachother, and easy to do once you figure out WHAT to do, the feeling of achievement from completing a chamber is never a dissaspointment, and as an additional reward, you get to hear some very humourous lines out over the game, together with BEAUTIFUL animations and delicious easter eggs.

A true must-have for everyone who loved the first Portal game.

On a final note:

"COMBUSTIBLE LEMONS!"

The game is entertaining and well-designed, the music and audio is very fitting to the enviorement, thus giving a mood to everything you do, giving a great feel of comfort when the soothing music of sunrise strikes your ears.
The gameplay, controls, hitboxes etc. are made entirely perfect, there are tons and tons of various weapons available at your disposal, and just digging down in the ground to smash some pots and kill some slimes can be hours of fun.

Getting started is a tad difficult after the latest updates, but you can watch some guides online before playing to skip the whole frustrating experience of not knowing how to cut down a tree and then get furiously murdered by Servants of Cthulhu.

Overall this game is underrated and very far from being a Minecraft ripoff, where minecraft focuses on building, Terraria focuses on exploring, fighting and generally going on adventure more.

For such a low price it's a FANTASTIC game!