We recently designed and developed a weekly "Challenge" application for the game Defiance from Trion Worlds. The idea is simple: enable fans to signup and take part in weekly in-game challenges (killing the most number of aliens for example). The winner, naturally, gets a prize, but the prize also depends on the number of "Sponsors" they sign up. The greater the number of sponsors, the bigger the prize, and the good news is that sponsors also share in the "winning". Each sponsor who sponsors the winner, get's a free copy of the game.

The application is also enabled as Facebook tab on their game's Facebook page.

User Registration Screen:
This screen allows users to register for each weekly challenge.

User Confirmation Screen:
Once a user registers they are given a unique sponsorship link that they can share (via social media channels or email) with friends in order to them them to sponsor their participation.

Sponsor Registration Screen:
This screen allow sponsors (invited by registered users) to signup as a sponsor. The screen (tied to registered user's unique sponsorship link) provides basic information the user (username, location, level, i.e.) as well as stats on how many sponsors they currently have signed up.

Administration:
The application was designed to allow the client to create, deploy and manage challenges themselves, so it comes with a robust administrative console that allows them to do that.