A Heartworm 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 €3.35 (-66%) at Difmark, Steam Account format · Cheapest official key: €4.41, 55% below the €9.90 Steam price · 5 verified stores, 5 offers in stock · Updated 01h 22min ago.
Heartworm for PC starts at €3.35 at Difmark, 66% under the €9.90 of the official store — but that is a shared account, not a key of your own. If you want a key tied to your own account, the cheapest is €4.41 at Kinguin.
This is the lowest price it has ever been recorded at.
That €3.35 already includes the Gocdkeys coupon, so apply it at checkout or the store will show you a higher price.
Only 5 offers across 5 stores carry it, and thin supply means the price barely moves.
That €4.41 key is at its usual price: no bargain, no spike.
Worked out from 548 daily records of the Steam Key for Heartworm across 4 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.
With the shared account at Difmark you log into an account that already owns the game: it is the cheapest route, but it never becomes yours and the seller keeps the credentials. If they ever lose or change them, you lose access.
The key at Kinguin costs €1.06 more, but you redeem it on your own account and the game stays there for good. That is the difference between renting and buying.
All 5 offers are Global, so the code redeems on any account no matter where it was created.
Critics Rating
Player Rating
Heartworm is more than just a tribute—it’s an evolution. Equal parts chilling and contemplative, it knows when to whisper and when to scream. From the... Read more
Heartworm is not just a love letter to classic horror games, but an odyssey through loss and the emotional toll of grief. On the surface,... Read more
Heartworm is another top notch indie horror to add to the collection and one that perhaps feels the closest to the games that clearly influence... Read more
Heartworm works best in its subtlest areas, leaving players to experience the tension of its beautifully creepy environments and its subtle, anxiety-inducing score and story.... Read more
Heartworm seems to be a sincere homage to the heyday of survival horror. It has a remarkable level of accuracy in capturing the style, sound,... Read more
I'm a veteran of the survival horror genre but I never truly felt comfortable with any of the control options it offers and its narrative... Read more
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