You are downloading the Superslug XAP file v1.15.512.1 for Windows Phone. Superslug is a free and fun Platformer game: Superslug must fight for his life against an invasion of ferocious chickens !Show you have guts and slug it out with the merciless chickens ... You can now download the offline XAP file to install & try it.
Download Locations for Superslug 1.15.512.1 XAP file
Important Notice: Now Due To Unspecified Limitations, You Can Not Use The Offline XAP 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 Superslug XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.