Can be activated in United States
WindowsScreenshots & trailer
Buy Heartworm key
Sam, unable to move on from the death of her beloved grandfather, falls down an internet rabbit hole chasing the promise of reuniting with him.
Following the lead of a mysterious forum, she finds herself at a supposedly supernatural house in the mountain, hoping to make contact with the other side.
A journey through grief and loss within retro-inspired atmospheric environments.
4-6 hours of gameplay with multiple endings
Both pre-rendered and in-game cutscenes
A focus on exploration with classic puzzles, and limited combat using a camera as a weapon
A modern control scheme with 3rd person over-the-shoulder aiming and optional classic tank controls
Optional pixelation and retro effects calling back to the first 3D console era for a more authentic experience
A haunting original soundtrack
Experience a psychologically-focused narrative love letter to late 90s genre staples Silent Hill and Resident Evil.
How to activate Heartworm on Steam
- 01
Buy & receive your code
Complete checkout — your code lands in your inbox in ~30 seconds, and is always available under Orders in your Gameplug account.
- 02
Open Steam
In the desktop client: top-left menu "Games" → "Activate a Product on Steam…" (or use the web link below).
- 03
Enter your key
Paste the key (format XXXXX-XXXXX-XXXXX) and accept the Steam Subscriber Agreement.
- 04
Install & play
The game joins your library permanently — install it on any machine you sign in to.
Code not working? Contact support — confirmed-invalid codes are replaced or refunded.
