Onset

Onset is an open-world sandbox with no predefined goals. Players start with an empty map and can create their own experiences or explore modes made by others.

Lua scripts can run on the server or client to define game modes and change the world. Functions let players spawn vehicles, NPCs, objects, and other elements, as well as load custom maps.

Players can host their own servers or play in singleplayer on localhost. Customization includes imported characters, animations, props, and sounds, along with weapon settings, vehicle damage, and HTML-based interfaces.

Praise in the supplied reviews is limited: one reviewer highlights the functional mechanics, Lua tools, and map editor, while several others say the concept had potential. More commonly, reviewers complain that development appears abandoned and that servers lack players or activity.