Bye-Bye BoxBoy! is a puzzle-platform game developed by HAL Laboratory and published by Nintendo for the Nintendo 3DS. The third game in the BoxBoy! series it was released worldwide in 2017. The game was followed by BoxBoy! + BoxGirl! for the Nintendo Switch in 2019. The player plays as Qbby a box with legs who can create boxes out of his body. The player must solve puzzles using these boxes which can stay on Qbby or be detached. If they remain attached to his body Qbby can use the boxes for movement by moving to the farthest box destroying the boxes in the process. Crowns are placed in every level and can be collected for an added reward.