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Explore a dark, dangerous scientific facility with three friends… or enemies. What Lurks Inside is a co-op (or singleplayer) horror game with strategic, roleplaying, and survival elements. Will you escape the laboratory with your teammates, or slay your friends as the monster?
Price history tracked since Jul 7, 2026 · vs all tracked offers.
Based solely on tracked price history — not purchase advice.
Tracked since Jul 7, 2026.
Steam Train Fest starts Jul 20, 2026
What Lurks Inside is a tense, semi-cooperative role-playing survival game about exploring, destroying, and escaping a mysterious scientific facility… or about disguising yourself to sabotage and undermine the foolish humans who have wandered into your lair. Where to go? What to gather? Who to trust? Use your cunning and judgement to make sure that you make it out alive…
Features:
Play either multiplayer or singleplayer (Multiplayer Recommended)
Random facility issues make each playthrough varied
Environmental dangers
Melee weapons and teamwork for human players.
Fast-travel and traps for the monster. Set up a plan several rooms in advance, or lay in wait to spring an ambush.
TRY TO PURGE THE LAB - BUT WATCH YOUR BACK…
Four bodies in environmental suits descend into the facility… but only three of them are human. Which of your teammates is the monster? Cooperate with the other humans (hopefully) to complete objectives and purge the lab.
SABOTAGE, TRANSFORM AND KILL!
The humans have no idea what you’ve got planned for them. As the monster, use special Bio-Growths to fast-travel around the facility, setting up traps and plotting vicious ambushes. Pick off your companions one by one, or all at once in a grand master-scheme! Sabotage their equipment all while ripping apart corpses and collecting their bits to use later in feeding the Bio-Growth.
Lowest tracked price: CA$6.49 (Jul 7, 2026) · current best: CA$6.49.
Right now the cheapest offer for What Lurks Inside is CA$6.49 at Steam. KingsPrice compares 1 offers from 1 stores — official stores and keyshops — and refreshes prices throughout the day.
The lowest price KingsPrice has tracked for What Lurks Inside is CA$6.49 (recorded on Jul 7, 2026). This covers the stores and period we monitor — set a price alert to catch the next drop to that level.
Create a free price alert on this page and KingsPrice will email you when What Lurks Inside drops below your chosen price. The biggest discounts usually appear during seasonal Steam sales and publisher promotions — the sale calendar on this page shows the next confirmed event.
