I have created a functioning game in redstone! It is kinda like russian roulette.

Additional Notes

It is all made with restone nd by myself.
I even had it on a puplic server =D. But Im afraid I dont have any pics and the server seems to be dead. =/
Its made without craftbook or any mods. But I have found craftbook and noticed that one of its functions would fit very good in the circut. It would replace the most "annoying" part of the system.
But I can still remake it on another server.
You play like this: For the player there is a button, a redstone torch and a lever. The players ( preferably 2) takes turn playing. You win the game if all other players have lost. What you do on a turn is simple. Pull down the lever for X amount of seconds, you decide. Then set lever back to its original state. Then You press the button. Wait a second and look at t torch. If it turns off you are out and have lost the game. If not it is the next players turn. And whenever someone survives it will get harder to survive for the next person.
Short overview :
First when the lever is pulled down the system will start to pick a random number from 0 to 7. When the lever is turned back up the system will stop at one of the numbers.
When the button is pressed the number is inserted and memmorised by the system. 0 is a safe number and is always result in a "survive". But the rest of the numbers work different. First the system will check if another player has recieved the same number. If not it will result in a survive. If another player has got the same number before it will result in "game over" for the current player.
If you get a survive the system will memorise the number you recived and if a new player gets the same number the will get a "game over".
A game over is displayed to the player by the redstone torch turning off.

Stay tuned! I got many more redstone projects coming, like new type of games, security systems and much much more. For example: Whack a mole! =D