1. What was the original idea or inspiration behind Cthulhu Keeper, and how has it evolved since the first concept?
The main inspiration is somewhat obvious: we had all played Dungeon Keeper I & II in the 90's and loved the Bullfrog classics' mood and the fun twist that you actually played on the evil side. An equally formative 90's title was Commandos: Behind the Enemy Lines. Both felt like rare gems that deserved a modern revisiting.
Lovecraftian stories, movies and comic books have always been dear to us, and we wanted to explore the mythos in the video game medium for the eerie, astral & horrible themes. And the monsters are just awesomely weird.
The aim was to fuse the gory horrors and the bit of tongue in cheek vibe from Dungeon Keeper into a horrible cult management game that we would like to play ourselves!
2. What has been the biggest challenge during development, and how did the team overcome it?
The biggest challenge must have been to combine the stealth tactics gameplay with the cult compound & management side.
You get to summon and play as Lovecraftian horrors – but in stealth gameplay, you are inherently weak and try to avoid mayhem and chaos, which the monsters naturally bring about. So we had to build progression and suspense before we could let the bigger terrors run loose.
The stealth missions are perfect for feeding the dungeon economy though. Gathering resources such as tomes, gold, corpses and other artefacts encourages players to explore every corner and fits the slower exploration pace.
Early concept 1.
3. Can you share a feature, mechanic, or detail that you're especially proud of, but think most players might miss?
One small mechanic that might fly under the radar is how the Mi-go can be used to mind control a guard. If you pull it off, you can sneak past other guards until shooting them in the back.
4. How did you approach sound design and music in a game where dread and atmosphere are so central?
We focused on ambient sound design more than traditional music. Things like distant whispers, dripping water, and creaking architecture help build tension. Instead of relying on a constant soundtrack, we used sparse, unsettling audio cues to emphasize specific moments. The cultists, too, have a kind of flat, ritualistic delivery that adds to the mood.
We were also lucky to work with Jeremiah, a voice actor whose low, textured delivery fits the tone well. His narration adds to the ritualistic, ominous feel of the world.
Sound plays a very important part in painting the atmosphere of any piece of media, and in a game inspired by cosmic horror it really needs to tap into the inconceivable. In Cthulhu Keeper, a lot of the sound design is based on human and animal voice recordings, mixing them with other sound sources like resonating metal and splashing water. In general the goal was to have the whole game sound magically mystical and evil, from the UI sounds to the dynamic in-game music reacting to the player's actions.
5. Was there a moment in development where something unexpected turned out to be a happy accident?
Yes, actually. At first we had a slapping mechanic for the Severed hand, similar to Dungeon Keeper. But when physics was turned on the characters turned into ragdolls and flew across the map. That being quite hilarious, we ended up keeping parts of it: now when you kill an enemy without gibbing, there's no death animation but rather you can see the ragdoll react to the force and make the kills look more, well, fun.
Early concept 2.
6. The graphical style of Cthulhu Keeper is quite fresh. How did you come up with it?
There have been comic book -style video games in the past, but here it seemed like a perfect match with Lovecraftian graphic novels of the past. Comic books can represent the vibe of horrible monsters in more exaggerated and stylized ways and gives a bit more freedom for the imagination. Also having this amount of gore in hyper-realistic style would probably be a bit too much for even the modern GPU's ;)
7. What advice would you give to indie devs or teams just starting out with their first game?"
1. Prototype deeply and early — but don't forget a coat of rough paint to get a sense of the mood also aesthetically
2. Iterate patiently — the real fun often only emerges after several rough, weird, slightly painful versions.
3. Build a unique identity — it's okay to borrow from the greats, but carve out something distinct. Lean into the strange. Embrace the uncomfortable.
For more talks, like-minded cultists, etc. find your way to our Discord -> https://discord.gg/cthulhukeeper