Prologue: Go Wayback! has exited early access on Steam, but is considered incomplete with no further development plans. Launched in early access in 2025 by PlayerUnknown Productions, the game faced significant challenges, including staff layoffs, leading to a halt in development. The studio, founded by Brendan Greene, aimed to use the game as a testing ground for its Melba game engine, designed for creating large procedural worlds. A free tech demo, Preface: Undiscovered World, is available in early access. The final version of Prologue includes new features such as enhanced paths, mobile weather monitors, and improvements in cooking, lighting, clouds, and fog.