Ikachan

Ikachan features unique gameplay; as opposed to using the arrow keys to move, the player uses the left and right arrow keys to tilt Ikachan in the respective direction. The player must then use the 'z' key to swim in the direction Ikachan is pointing. Thus, Ikachan cannot swim directly to the left or right at first, but he later acquires an item that allows him to charge horizontally. Also, while being unable to hurt enemies from the start, once Ikachan receives an item called the Pointy Hat, he can attack enemies by ramming them with the point of the hat.

The game contains role-playing game-aspects, as Ikachan can level up after attacking enough enemies or eating fish.

Ikachan takes place in Ironhead's realm, an underwater cave system. A series of earthquakes had recently caused cave-ins that cut off Ironhead's realm from the open sea. As such, the inhabitants of the cave ran out of food and were required to carry pearls marking their allegiance to Ironhead. Ironhead himself remains stuck in a private cave, spreading paranoia and encouraging violence against non-citizens to keep the population of the cave from overthrowing him as their leader. Ikachan wakes up inside the cave and swims around, searching for a way to escape.

Ikachan is a squid-like creature who awakens inside Ironhead's realm. He is the main protagonist and playable character.

The 3DS version received "mixed or average" reviews according to the review aggregation website Metacritic. MTV's Jason Cirpriano stated that the game would appeal to fans of Cave Story, but also noted that it could be completed in about an hour.