Here are some ideas.
Game Description:
* Multiplayer, with a minimum of 3 players;
* The seeker will see a fogged screen for 10 seconds before the game starts;
* Other players will have at least 10 seconds to hide themself, or while the seeker don't find them;
* The seeker need to touch a player to catch him;
* A random catched player will be the next seeker;
* If a player save himself in a round, he will earn points;
* Will be made an Leaderboard;
* Little items will improve your stats;
* More points will give you bonus on speed, hidden effectiveness and seek;
* Very rare and paid items will give to the player X-Ray for 1 to 1.5 seconds of exposure;
* Points can buy paid items;
* Money can buy paid items and help to improve the game;