Chitei Tairiku Orudoora

A side-scrolling platformer developed and published by SunSoft for the Famicom Disk System. It is the third entry in a series of educational math games.

Chitei Tairiku Orudora ("Underground Continent Orudora") is a Famicom Disk System action platformer from SunSoft and the third part of their Chinou Game Series, each borrowing an existing NES game's model (in Orudora's case, Atlantis no Nazo) and adding arithmetic problems to it. In Orudora, the actual math puzzles are relegated to an ancillary mini-game found on the disk.