Well Done Valve
I cordially regard it as a marvellous game.

Valve really knows how to design, polish and perfect a game.
All of these 19 episodes are narrated in a suitable velocity, yet the plot is ascending and finally leads to a breathtaking climax. I was really nervous and worried about what the consequence will be at that time. For that, my heart was pounding and my feet felt ice-cold. It successfully strained my nerves.

The momentum control is a bit of hard. Many times i struck the ground where was beside the portal , rather than just pass through the portal.

The quizzes are neither too simple nor too complicated, which could be just solved with my all-out endeavor.
And when it comes to the end, all the skills you learned will be systematized into a whole.
It's a delicate design indeed.

In a word , it deserves its credit.

[h1]Still alive[/h1] Well Done Valve I cordially regard it as a marvellous game. Valve really knows how to design, polish and perfect a game. All of these 19 episodes are narrated in a suitable velocity, yet the plot is ascending and finally leads to a breathtaking climax. I was really nervous and worried about what the consequence will be at that time. For that, my heart was pounding and my feet felt ice-cold. It successfully strained my nerves. [spoiler]The momentum control is a bit of hard. Many times i struck the ground where was beside the portal , rather than just pass through the portal.[/spoiler] The quizzes are neither too simple nor too complicated, which could be just solved with my all-out endeavor. And when it comes to the end, all the skills you learned will be systematized into a whole. It's a delicate design indeed. In a word , it deserves its credit.