I’ve written before about how I use online video games and their “walkthroughs” as language development tools. I’ve just added two more examples to my Intermediate English site under Word and Video Games.
One is called Cube Core (under “Play This Game” be sure to click “pop-up” or else it might freeze up your community like it did mine) and its Walkthrough.
The other is called Nigepico. It, too has a Walkthrough.