In Untitled Backpack Game, you are given a continuous stream of tetromino-like objects to fit into 4x4-slot backpacks. Once you can't fit anything else in the current backpack, you send it to the conveyor belt where your goal is to pack the backpacks as efficiently as possible. You lose the game if you don't create new backpacks fast enough and the queue of new objects is full, or if you run out of room on the conveyor belt to fit more backpacks.