A How 2 Escape Lost Submarine Steam Key — also known as a CD Key or digital code — is the official activation code you redeem on Steam and keep in your library permanently. From €1.49 (€1.96 with fees, -70%) at Kinguin, 70% below the €6.49 (no fees) Steam price · 5 verified stores, 5 offers in stock · Updated 05h 31min ago.
Official stores are authorized distributors, and while their prices may be higher than Key stores, their reliability is 100%.
“Choose it if you don’t mind the price difference”Key stores are resellers and marketplaces, which is why they are usually cheaper than official stores. We only show the best ones, so you can rest assured. Plus, we offer our guarantee against any issues.
“Choose it if you’re looking for a great discount”Final prices with fees and discounts applied

The latest edition in the How 2 Escape series, How 2 Escape: Lost Submarine has you and a partner work together to locate a missing submarine and prevent the start of a global war.
An important allied military base has been captured by enemy forces, prompting the government to preemptively order the launch of a torpedo to reclaim it - despite the potential for countless allied deaths.
However, after further internal discussions and negotiations with the enemy, the government cancelled the strike that could spark a potential global war. The only problem is "The Triumphant," the submarine carrying the torpedo, is out of communication range and no one can confirm if the cancellation orders have reached the submarine.
To prevent war, the government has tasked its two best experts, Haurée and Leroy, two strategic masterminds of the submarine fleet, to locate “The Triumphant” before time runs out and spread the latest information. These experts will face a reality they did not expect. Underwater, the startling torpedo decision broke out, igniting a moral dilemma among the sailors.
Put your communication and puzzle-solving skills to the test as you and a partner work together to prevent the start of war! Each of you has a crucial role to play that requires logic, coordination, observation and, above all, communication!
As player one, your job is to locate and investigate the inside of the submarine, where you’ll explore and interact with the environment.
Your friend is tasked with using the dedicated free companion app* to gather additional information so you both can solve the puzzles together.
*Get the free How 2 Escape: Lost Submarine Companion App on smartphone.
Features:
Co-op puzzle solving with a friend
Cross-platform plays on two devices
Only one copy of the game is needed (download the free companion app on PC or mobiles for the second player!)
Increasingly challenging puzzles
Simple controls
How 2 Escape Lost Submarine for PC starts at €1.49 (€1.96 with fees) at Kinguin, a Steam key, which is 70% under the €6.49 (no fees) it costs on the official store.
That €1.49 (€1.96 with fees) already includes the OCTGOC10 coupon, so apply it at checkout or the store will show you a higher price.
Supply is thin — 5 offers from 5 stores — and thin supply keeps prices steady rather than falling.
That puts it 41% under its average of €2.78 since 2025, so today is a better entry point than most days of its life.
That €1.49 (€1.96 with fees) key is at one of its best prices.
Worked out from 997 daily records of the Steam Key for How 2 Escape Lost Submarine across 6 stores. See the full price history.
The price does not include each store's payment fees. The percentage is measured on the store price, without coupons, because that is how we record the history. The analysis only counts Key offers. Shared accounts, Steam Gift and physical editions stay out, because they are not the same product and their prices move differently.
All 5 offers are Global, so the code redeems on any account no matter where it was created.
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* languages with full audio
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What do our users think of How 2 Escape Lost Submarine for PC Digital?
Collaborate across two devices in a tense levelled co-op experience. As one player explores a submarine, the other guides a player via their companion app to stop a torpedo launch. Fun, time-sensitive puzzles will test communication, teamwork and logical thinking.
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