WASD / Arrows or touch-drag to swim · your rig fires on its own
Harvest drifting plankton light to evolve the suit · survive the swarm
A Leviathan rises every minute — kill it, crack its treasure chest. Max a weapon, then open a chest to awaken its true form.
◈ SUIT EVOLUTION ◈
CRUSH DEPTH
the light goes out
HOLDING
press esc / p to resume
Lumen Deep — Free Browser Bioluminescent Survival Roguelite
Lumen Deep is a free, no-download survival roguelite you can play instantly in your browser. Pilot a deep-sea exosuit through swarms of bioluminescent predators; your rig fires on its own, so your job is to swim, dodge, evolve your weapons, and outlast the Leviathan boss that surfaces every minute. Plays great on phones and desktop.
How to Play
Swim with WASD or arrow keys on desktop, or touch-drag anywhere on mobile — your finger becomes a joystick wherever it lands.
Your weapons fire automatically at nearby predators. Positioning and dodging are the whole game — hold the fight, don't just kite.
Collect XP gems that drop from kills. Fill the XP bar to level up and pick from three upgrade cards.
Chase evolutions. Stacking upgrades on the same weapon eventually evolves it into a much stronger form.
Open treasure chests for bigger boons — new weapons, passives, or one-off buffs.
Fight the Leviathan. Every minute a boss arrives. Learn its telegraphed attacks; each is dodgeable if you read the tell.
Watch the combo meter. Rapid consecutive kills build combo and boost your damage — the higher the combo, the deeper you dive.
Tips & Strategy
Circle, don't line. Moving in a wide arc keeps enemies clustered behind you where your auto-firing weapons can sweep through them, instead of catching up to your flank.
Commit to one main weapon. Picking upgrades for the same weapon repeatedly is how you unlock the strongest evolutions — a fully-evolved single weapon is far better than a shallow spread.
Prioritize picking passives when your HP is low. A damage evolution doesn't help if the next Leviathan kills you first. Armor, dodge, or life-steal cards can rescue a run.
Read the Leviathan's tell. Every boss attack has a visible wind-up. Learn one boss at a time and pre-position instead of reacting.
Don't hoard treasure chests. Open them as they appear — the boons scale with your current level, so waiting doesn't make them better.
Manage your combo. If your combo meter is high, briefly kiting to keep it alive is worth it. If it's already dropped, don't scrape for it — reset your positioning and start fresh.
About the Game
Lumen Deep is a free browser take on the "bullet heaven" survival roguelite — think Vampire Survivors or Brotato, but in the deep sea with bioluminescent glow, drifting kelp, and a Leviathan boss every minute. Auto-firing weapons handle the shooting; you handle the swim. Each run is a build-crafting puzzle: which weapons to take, which passives to stack, when to evolve. The abyssal cyan/coral/kelp palette and slow drift of the ocean floor make it a calmer take on the genre than the frantic neon-arcade variants. Plays on phones, tablets, and desktop.
Frequently Asked Questions
Is Lumen Deep free to play?
Yes. Lumen Deep is completely free and plays right in your browser, with nothing to download or install and no account required.
How do you play Lumen Deep?
Swim your exosuit around the depths — WASD or arrow keys on desktop, touch-drag anywhere on mobile — and your weapons auto-fire at nearby predators. Collect XP gems from kills to level up and pick from three upgrade cards; open treasure chests for bigger boons. Survive the Leviathan boss fights that arrive every minute.
Does Lumen Deep work on mobile?
Yes. Lumen Deep is built for touch — press and drag anywhere on the screen to spawn an on-demand joystick, and let go to release. It also plays on desktop with WASD or the arrow keys.