You are downloading the Cool Game Stuff AppX file v220.127.116.11 for Windows Phone. Cool Game Stuff is a free and useful Entertainment app: With this app you can quite easily see my CoolGame reviews on the various games I play. But also my Youtube videos in which I explain parts in the ... You can now download the offline AppX file to install & try it.
Download Locations for Cool Game Stuff 18.104.22.168 AppX file
Note: To install it manually from an SD card, you should choose one of the server location above to get the offline Cool Game Stuff AppX file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.