Location-based ad-hoc game services

A game service system for administering games over a wireless telecommunications network serving a number of mobile terminals, said wireless telecommunications network including a number of base stations providing wireless communication coverage for corresponding geographically defined cells, the game service system comprising:

• means for establishing a game offering in response to a triggering event;
• means for designating a region in response to the established game offering;
• means for locating mobile terminals within the designated region;
• means for sending over the wireless telecommunications network, to mobile terminals within the designated region, an invitation to participate in a game in accordance with the established game offering, said means for sending being a network entity other than a mobile terminal participating in the game;
• and,
• means for collecting over the wireless telecommunications network, from mobile terminals to which the invitation was sent, responses to the invitation, said responses indicating that the invitation to participate in the game has been accepted or declined.