DUO

DUO is a 2004 puzzle game from Binary Zoo Studios that revolves around manipulating paired elements and thinking carefully about movement and positioning. Its compact design places the emphasis firmly on solving challenges rather than delivering a huge story or elaborate presentation. The concept is easy to understand, but puzzle games have a nasty habit of becoming considerably less friendly once the first few levels are behind you. DUO belongs to that satisfying tradition where a simple mechanic gradually reveals unexpected depth. It is the kind of game that encourages you to say “I know exactly what to do” immediately before spending ten minutes proving yourself completely wrong.