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Fiend Heart
A difficult short game about monster girls.
View on Steam ↗ Free (US · as of 2026-09-28)What players say
Steam review score and the most-helpful voices, which may include critical ones. Score via Steam as of 2026-09-28.
“Alright, so, I'm officially a fan of your work. HAHA! Literally after meeting the cyclops doctor I was hit by a fire spamming hell, and all I thought of was Undertale as I died on repeat. Got past it, haven't beat the whole thing yet but it said "a short game" so I have to…”
— a player, Steam review · 1 hrs played“Fun and amusing.”
— a player, Steam review · 1 hrs playedAchievement stats
Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-09-28.
Latest official news
Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.
Dungeon Watchers, a game in the same universe that Fiend Heart is out!!
Hello everybody, today I launch my new game Dungeon Watchers on early access here on Steam, and it's featuring Iris as playable character, not only that, but the second map is inspired on Eliza's cast
Fiend Heart 1.1 is now live
Small update which adds small features to the game, here is a list of the changes: Keyboard and Gamepad rebind features added. The aerial movement for the jump of Eliza have changed, player now have m
The upcoming weekend a small update is coming!!!
Originally I was planning on making a big update with new levels for January, but so many circumstances didn't allow me to fully dedicated to the project, so I have decided to make smaller updates and
One year ago, I released Fiend Heart
Hello, I am RM120, and I developed this game alone (which is also my first game ever) on my free time after work. Prior to this game I hadn't any experience on coding, neither on sprite animation and
Fiend Heart is now released
Today I release my game Fiend Heart... a silly short game I made with the things I like. I hope you like it. Between today and tomorrow I will upload a tutorial about how make your translation of the
Screenshots
Official Steam store screenshots — click any shot to enlarge.
Facts & details
From the Steam store record, snapshot 2026-09-28.
| Genres | Action, Adventure, Indie, Free To Play |
| Player tags | Difficult · 2D Platformer · Free to Play · Cute · Funny · Singleplayer · Side Scroller · Short · Action · 2D · Anime · Comedy (Steam store community voting) |
| Features | Single-player · Steam Achievements · Partial Controller Support · Family Sharing |
| Languages | English, Spanish - Spain, Japanese |
| Achievements | 8 |
Minimum system requirements (PC)
Minimum: OS *: Windows 7 Memory: 1 GB RAM Storage: 500 MB available space