I was requested by a Naruto loving Frog to make this thread so some of the concepts you see on here will be from him. All right let's dive in then.

Tic-Tac-Toe
For Tic-Tac-Toe a GUI comes up with the assigned letters of X and O that the players are given and when they touch the board during their turn it would turn into the letter they were assigned. There would be a cue to join the board to avoid interference from other players.

Hangnoob
This would also involve a que for joining, but possibly with more players (1 host, 1-3 players). The host would be given a box to type the word they were thinking on and blank letter areas would appear to the corresponding word. Every time a player guessed a letter correctly, the host would tap the blank letter space and fill it in. Every time a player guessed it wrong, the host would tap the hangman and it would add a part.

These are a couple ideas. Post what you think and also post some ideas you have. Ideas with demonstrations give a more clean point of where you're coming from.

 

MANCALA!!!!!!!!!!!1!!1!1!!!!!!!

It's fun :0...

And for other ideas, Whacka-Noob. 3x3 grid where the player can walk over and each time a head pops out you smack it.

Bombsketball. You have a designated area to throw and hit as many bushes with the bomb as possible. The color of the bush will also indicate the gralat prize underneath it. Blue = blue gralat, red = red gralat. Ultra rare yellow bush (no it does not mean someone had to go) = gold gralat.  

Another one I thought of was a small table with a chess board (or checkers) with two chairs on each side. One being black. One white. When you grab at one of these chairs like a piano it brings up the chess board. Depending on the color chair you sat in is what side you're on. If you wish to view the on going game simply double tap on the board and it'll bring up the screen of the game being played. Now if one person dismounts the chair the game resets since its a forfeit technically. And there could also be a little win-loss-stalemate ratio like the RPS game which you can simply say "show chess" or "show checkers" to check it. Also there can be a portable version slightly more expensive and less adequate looking than the house version. The person who hosts the game goes first.  

I like the hangnoob idea aha, but doubt they will do any games like this as they are SO BUSY  

Here is a new version of a game I though of. It is a complex version of connect 4.(this plays in a popup screen used by both players) The point of the game is to connect 4 blue gralats together and win. To play,it starts as a 4x4 board,then player one adds 1 gralat on the board and switches and so and and so forth. Once a gralat becomes a 5(blue) the space turns into their color(color chosen before game starts,done by computer with red vs blue) with the blue gralat on top. Once a player gets 4 connected,they win.  

I made a thread about era on this.