Crash Test Idle is an incremental idle game that features crash-test vehicles and environments. A player can relax while watching mini, crash-test cars slam repeatedly into the red-and-white striped section of barrier walls.
The main goal of the game is to earn gold and blue coins to continuously upgrade crash-test cars and related talents and the distance of each car's crash-test zone. The game starts with one car. It auto-crashes into a wall without the player performing any clicking beyond interaction with upgrade buttons after the car earns a certain amount of income.
The player uses gold coins to purchase upgraded cars and extend the zones. The game displays stats about each available vehicle, such as its level, acceleration and maximum speed and the amount of income it generates, when the player hovers a cursor over the car. They use blue coins to upgrade talents that perform tasks, such as increase the percentage of income and a car's reloading time, maximum speed and acceleration or reduce the cost of a car.
Crash Test Idle alerts the player of available upgrade opportunities with a green button for car and zone upgrades and a blue exclamation point for talents. The player can also earn more coins by selecting flashing ones that appear on the screen and watching advertisements that add coins to the total balance or turn on a multiplier feature.
