Radon Glow

Radon Glow is an underground inspection game. Radon is invisible and
odorless, so your detector is your only guide: listen to the tick rate,
watch the screen glow, and close in on hidden hot spots.

Walk basements, old mine tunnels and a sealed subway spur. Deploy vent
pipes and sealing film to tame every hot spot, turn rooms green, and
secure the zone with full coverage. Keep an eye on your dose bar; retreat
to the entry pad and rest before it maxes out.

Earn coins for clean patrols and spend them in the Supply Shop on a
stronger sensor, a lead-lined suit, extra pipes and films, a rapid
recuperator and a tracer revealer. Every item works immediately in the
field.

Three hand-built zones, persistent progress, and one rule: trust the
detector, not your eyes.