Nostoi

Nostoi is a single-player 3D puzzle platformer about an anonymous boy trying to escape a limbo caused by his psychological problems. You explore unusual lands, study their physical phenomena and solve puzzles to move on. The story draws on psychological ideas such as false memory, as well as references to pop culture.

The limbo

The boy’s limbo contains lands with unusual physical phenomena that you must understand and overcome. In each land, his subconscious creates an ally: a tiny monster called Regrepsa. Regrepsa shares information about the land and the wider situation, and offers clues about how to escape, though its explanations are mysterious.

Puzzles and time

Every level has a puzzle you must solve to proceed. Challenges include rebuilding destroyed stairs, sneaking unnoticed and returning blocks to their original places. Almost every land contains Time Obelisks, which can revert some objects to their default positions. You need to reach the obelisks or activate them in a particular way; once all the obelisks in a level are active and its puzzle is solved, the gate to the next land opens.

Each land also has its own physics areas, so you must examine the surroundings and work out which combination will let you succeed. Regrepsa can provide hints, but solving the puzzle is up to you.

Art and play

The game uses cel-shaded chibi art. Its calm but challenging puzzles call for focus and careful analysis of the environment.