Your friends are shown on the maps.Positions of players are detected by GPS.You can play with them: shot, hide, run-away.How it works:- Tap on your friend- Get your favorite weapon- Shot him or her- Your friend will get a push notification even if he is offline- Your victim get a red screen- He should shake the phone intensively for few seconds- Or he will dieBuy new guns, shot everyone! Enjoy!Attention: ONLY foursquare users are allowed duringour limited BETA testing.