Well, probably you played the last unity games some weeks ago. In Chrome version 42 Google decided to disable NPAPI support in Chrome by default, unless this games were compiled with the preview WebGL compiler of Unity 5 you cannot play them in Chrome (anyway is a preview compiler that doesn't work very well, and our games have some problems compiled this way). For now you can re-enable the web player following the tutorial linked also in the game news: http://twiik.net/articles/google-chrome-just-killed-the-unity-web-player (anyway the NPAPI support soon will be definitively disabled by google).
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Well, probably you played the last unity games some weeks ago. In Chrome version 42 Google decided to disable NPAPI support in Chrome by default, unless this games were compiled with the preview WebGL compiler of Unity 5 you cannot play them in Chrome (anyway is a preview compiler that doesn't work very well, and our games have some problems compiled this way). For now you can re-enable the web player following the tutorial linked also in the game news: http://twiik.net/articles/google-chrome-just-killed-the-unity-web-player (anyway the NPAPI support soon will be definitively disabled by google).