Tic Tac Toe
The one everybody already knows the rules to. Best of nothing, settled in a minute.
Games
Play a friend without leaving the conversation.
Four games, played inside the chat you were already having. The invite arrives as an ordinary encrypted message; the match itself is refereed by our server, which means the moves are not private — and that is worth being clear about.
Server-refereedMoves, scores and results
Four games, properly finished
Rock Paper Scissors
Simultaneous moves, which is exactly the case a referee is needed for — neither phone can be trusted to reveal second.
Hand Cricket
The playground classic. Bat, bowl, and lose your wicket to a matching number.
Snake
Arcade Snake, refereed frame by frame so a modified client cannot simply declare itself the winner.
A referee has to see the game
Two phones cannot agree on who won without either trusting each other or trusting something in the middle. Trusting each other means the first modified client wins every match. So our server holds the rules and validates every move — which requires it to read them.
Invites follow the same reachability rules as messages: you can only invite someone you could already message. A game invite is not a way around the PIN.