Shiftlings is a platform puzzler video game developed by Rock Pocket Games. It can be played either alone or with a friend, and features two Alien Twins connected to each other via a cable. In single-player mode, the player can switch between controlling both aliens and also change their sizes; in co-op mode, each player takes control of one twin. Switching size is an important part of solving puzzles as the smaller twin has higher jumps while the bigger one cannot jump but instead push objects around and serve as a trampoline for its partner. The cable connecting them provides both challenges and solutions throughout levels in order to reach their goal.