Monster World IV[a] is an action-adventure platform game developed by Westone and released in Japan by Sega for the Mega Drive in April 1994.

[1][2][3][4] Monster World IV was the last Wonder Boy game to both be published by Sega and developed by Westone Bit Entertainment.

Expanding upon previous games in the series, Asha has the ability to swing her sword upward, downward, and forward while in midair, depending on which direction is pressed.

The story involves a young girl named Asha, who, upon hearing spirits whisper on the wind pleading for help, embarks on a journey to find and help them.

The game, which features 3D graphics, gameplay enhancements, new modes, and voice acting, was developed by Artdink for PlayStation 4, Nintendo Switch, and Steam.

It was released in May 2021 for Switch and PlayStation 4, and in June 2021 for PC, published by ININ Games in the West and G Choice in Japan.