Engine Of Sin is a giant robot first-person simulation game in development by Swimming Scorpions for PC via Steam, with no announced release date.
Swimming Scorpions announced Engine Of Sin in June 2026, first as a giant robot piloting simulator with a dark fantasy setting and resource-management focus, then elaborated on its first-person shooter elements a few weeks later. The game casts the player as the pilot of a malfunctioning battle robot in a dying world, where survival depends on managing power distribution across systems, switching between eight weapon types, and collecting supplies between fights. The robot is a four-floor walking fortress, and the game offers multiple endings.
The visual style draws from 90s first-person shooters, with rugged robot design and retro aesthetics. The developer has confirmed Japanese language support for the Steam release but has not set a release date. The two announcements, spaced three weeks apart, frame the game as both a simulator about system maintenance and a shooter against monsters, without contradicting each other.
Written with AI from the cited Yomimono stories below, each itself sourced. See our editorial policy. Every fact links the story it came from.
Structured graph also available as JSON at /public/entities/engine-of-sin.
CC BY 4.0.
Developer Swimming Scorpions announced 'Engine Of Sin', a first-person simulation game for Steam where the player pilots a giant robot against monsters in a dying world. The game features rugged robot design and 90s-style FPS visuals. Players manage power distribution across systems, switch between eight weapon types, and collect supplies between battles. The release date is undecided, with Japanese language support planned.
Swimming Scorpions announced 'Engine Of Sin', a giant robot piloting simulator set in a dark fantasy world. Players manage power distribution, weapon systems, and life support inside a malfunctioning battle robot while fighting monsters. The game features 90s-style FPS visuals, eight weapon types, multiple endings, and exploration of a four-floor walking fortress. It is planned for PC via Steam with Japanese language support.