The game of Red Light is a very simple jeopardy game in which two players race to reach 50 points. In a bag, 4 red and 24 green chips ("lights") are shuffled. Each turn, a player repeatedly draws chips until either a "red light" is drawn or the player holds and scores the number of "green lights" drawn (i.e. the turn total). At any time during a player's turn, the player is faced with two decisions: Draw ("Go") - If the player draws a Red: the player scores nothing and it becomes the opponent's turn. If the red draw was the last remaining red, all chips are returned to the bag and are shuffled. Green: the player adds 1 to their turn total and the player's turn continues. Hold ("Stop") - The turn total is added to the player's score and it becomes the opponent's turn.
In this free game app, there are three computer players of varying difficulty. The hardest computer opponent features a neural network that approximates optimal play.