A text-based survival incremental in the browser tab: explore a ruined underground City sector by sector, scavenge resources, build up a home camp, and slowly rebuild lost technology - one click at a time, on desktop or a phone touchscreen.
Want a faster-paced arcade fix instead? Try Space Huggers.
A text-based sci-fi survival incremental. About 8 MB downloads once from this site when you press Play, then the browser caches it.
Every action is a click or tap - no keyboard shortcuts to learn. Progress autosaves in this browser roughly every 2 minutes.
Level 13
freetoolonline.com editorial team
Level 13 is a text-based survival incremental that runs entirely in the browser tab: explore a ruined underground City sector by sector, scavenge resources, build up a home camp, and slowly rebuild lost technology. Press Play to start.
Every action - move, scavenge, build, craft, fight - is a click or a tap. There is no keyboard shortcut scheme to learn, so the game plays the same on a phone touchscreen as on a desktop mouse.
A tech tree slowly unlocks new tools and buildings (workshops, greenhouses, hospitals) as you find blueprints and spend scavenged resources; progress compounds the longer a single run goes. Each new game generates a unique underground map from a random seed, and only that seed needs to be kept between sessions - not the whole map.
Progress autosaves in this browser roughly every 2 minutes, with a manual save option and multiple save slots so more than one run can be kept side by side. There is no account and no server, so clearing this browser's site data erases the save.
The game is about 8 MB - the engine, audio, and images - downloaded once from this site and then cached; no other network calls follow (the upstream game's visitor counter and error tracker were removed for this hosting).
Level 13 runs on the open-source Level 13 engine (Apache-2.0) by nroutasuo - the game's own in-app credits and changelog ship unchanged.
Frequently Asked Questions
What does Level 13 do?
It is a text-based survival incremental that runs entirely in the browser tab: explore a ruined underground City, scavenge resources, build up a camp, and rebuild lost technology through a tech tree, one click at a time. It runs on the open-source Level 13 engine.
Does it work on a phone?
Yes. Every action is a click or a tap, so the interface works the same on a phone touchscreen as on a desktop mouse - there is no keyboard shortcut scheme to learn.
Is my progress saved?
Yes - progress autosaves in this browser roughly every 2 minutes, plus a manual save option, and multiple save slots let you keep more than one run side by side. There is no account or server, so clearing this browser's site data erases the save.
Is the world the same every time?
No - each new game generates a unique underground map from a random seed. Only that seed needs to be kept between sessions, not the whole map, which is why saves are small.