Chrome does not support NPAPI plugins anymore and therefore you can’t play Unity Web Player games from Chrome
unless you activate it manually.
There are two ways how to play games which requires Unity Web Player:
1) Use different browser
Install other browser than Chrome, such as: Internet Explorer, Firefox or Opera
2) Enable NPAPI plugins (until end of 2015)
- copy paste chrome://flags/#enable-npapi into Chrome address line and press enter
- click on “Activate”
- close Chrome and start it again