Steins;Gate: Heni Kuukan no Octet

A non-canon extension of the True End of the original game. Unlike the modern visual novel format of the original game, this retro game perfectly mimics the style of graphical text adventure games from the 8-bit PC era (e.g. PC-88), with the player typing short commands to interact with and explore...

The premise of the game features Okabe receiving a D-Mail from himself in 2025 that states that he must save the future by reclaiming an IBN 5100 from a person under of the alias "Knight-hart". This person is Takumi Nishijō of Chaos;Head, as he runs under the same player name in his favorite MMORPG,...