Arctic Adventure: Penguin & Seal is a charming unlicensed puzzle game developed by Sachen for the NES. Players control Mr. Penguin on a mission to collect diamonds scattered across 50 icy levels and return them to his igloo. The gameplay requires strategic movement to avoid sharp-toothed seals, which can be neutralized by pushing ice blocks onto them. The game also features a custom level editor, allowing players to design and play their own challenging stages. Known for its escalating difficulty and catchy tunes, it is a sought-after collectible for fans of obscure 8-bit regional releases.