You are downloading the Critical Mass APPX file v2015.404.1541.4955 for Windows Phone. Critical Mass is a free and fun Strategy game: A simple but challenging Multiplayer board game where you can play against your Facebook friends or other people all over the world! You can ... You can now download the offline APPX file to install & try it.
Download Locations for Critical Mass 2015.404.1541.4955 APPX file
Important Notice: Now Due To Unspecified Limitations, You Can Not Use The Offline APPX File To Install It Any More.
To try to install it manually from an SD card, you should choose one of the server location above to get the offline Critical Mass APPX file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.