Full game metadata
| Field | Value |
|---|---|
| Steam app type | game |
| Steam App ID | 4524120 |
| Live current players | 0 |
| SteamPulse tracked peak | 0 |
| Live count (today's peak floor) | 0 |
| Price | No longer available on Steam Store |
| Free to play | No current Steam offer |
| Discount | Not available |
| Original price USD | Not available |
| Current price USD | Not available |
| Release date | 2027 |
| Developer | Phantom Doll Lab |
| Publisher | Phantom Doll Lab |
| Owners estimated | Not available |
| SteamSpy owner estimate minimum | Not available |
| SteamSpy owner estimate maximum | Not available |
| Review type | No user reviews |
| Positive review percent | Not available |
| Positive reviews | 0 |
| Negative reviews | 0 |
| Total reviews | 0 |
| Steam recommendations | Not available |
| Achievements | Not available |
| Average playtime forever | Not available |
| Windows support | Yes |
| macOS support | No |
| Linux support | No |
| Parent game | Not available |
| Store URL | Not available on Steam Store |
Short description
Hollow Heart is a growth‑simulation game about forbidden human transmutation and twisted sisterly devotion. As the elder sister, you gather materials, rebuild your little sister’s soul and body, and attempt to revive her in a more “perfect” form.
About this game
Blasphemous Sister‑Obsessed Human Transmutation Hollow Heart is a growth‑simulation game built on the theme of blasphemous, sister‑obsessed human transmutation. As the elder sister, you will do whatever you can to resurrect your beloved little sister who has died. Gather materials, strengthen her soul and body, and bring forth a sister who is ever more “perfect” and “complete.” At the end of this profane path, will you truly be able to reclaim the sister you once knew? Human Transmutation Your sister can be revived by offering a body and a sacrifice. To erase the sacrifice’s personality and anchor your sister’s soul, you must fuse different bodies together. Prepare stronger vessels and superior sacrifices to resurrect the ideal little sister. Raising / Growth After transmutation, your sister’s soul and body are fragile and short‑lived. Educate her, train her, and build a bond of trust as you face hardships together. If she reaches the end of her lifespan, use her remaining body as the foundation for the next transmutation. Exploration / Combat Venture out to gather the materials needed for transmutation and growth. Along the way, primitive creatures and humans bound by trivial notions of morality will stand in your path. Work together with your sister to overcome them and carve your way forward.
Supported languages
English, Japanese