Trap Maker is a mode based off of Ultimate Chicken Horse.
In this mode you and 3 other people can place down bots that do certain things like shoot a projectile or use an ability when damaged. This system allows for a lot of cool contraptions to be made, similar to something like Minecraft redstone.
Once everyone is done placing traps everyone has to run through them and to get to the end.
You can also give bots "effects" that change their properties.