The Game theory is not simple. 

1) Make all GTA features but there is an AI Robot Apocalypse.

2)  At the start of the game, notify the player of the Apocalypse.

3) Supply the player with as many guns, bombs and make the player be able to build with wood, metal and make as little closed spaces as possible

4) He should have health and some when he gets hurt spawn 3 to 4 health boxes across the map and show them on the map as a red cross

5) There should be a storyline of how it happened, how to stop it and the powers the AI robots have

6) Spread 1000 coins around the map which gives the player 1000 dollars

7) Make a health bar available at the bottom left corner of the screen

8) If he gets any damage, put a small pop up saying that half a heart is 500 dollars

9) Give the robots special abilities like fire blasts, electric shots and others

10) The objective of the game is to kill the boss of the AI Robots AKA Robo

11) The player should spawn at the far end of the map for him to travel all the way where Robo is. Robo should be in a building in the middle of the map

12) Robo should have all the robot's power combined

13) You are the one to choose how Robo will die and his weaknesses

*14) Should be 3d