Tiny and Big: Grandpa's Leftovers

Tiny & Big in Grandpa's Leftovers is a 2012 puzzle-platform game developed and published by German indie team Black Pants Game Studio. The game's story focuses on Tiny, an inventor, on a mission to retrieve his prized possession, a magic-imbued pair of briefs left to him by his disappeared grandfather, from his "sandbox rival" Big, who intends to use them to rule the world.