A downloadable game for Windows, macOS, Linux, and Android

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Kingdom of Astaria has been plagued by a peculiar curse making every man affected by it strangely attracted to the local demon lord. Become a young hero-to-be and try to find a cure for this wretched curse.

How to defeat a demon lord?! is an upcoming lighthearted BL fantsy visual novel featuring:

  • Two modes: How to befriend a demon lord?! - All ages & How to seduce a demon lord?! - Adults only; each with its own CGs
  • 4 love interests
  • A nameable protagonist
  • 5 endings


Demo created for Yaoi Game Jam 2018

Updated 16 hours ago
StatusIn development
PlatformsWindows, macOS, Linux, Android
Rated 4.6 out of 5 stars
(10 total ratings)
AuthorBlair Fujin
GenreVisual Novel
TagsAnime, bl, Boys' Love, Dating Sim, demons, Fantasy, Ren'Py, Yaoi
Average sessionA few seconds
InputsKeyboard, Mouse, Smartphone


Download NowName your own price

Click download now to get access to the following files:

Demo - Windows & Linux 171 MB
Demo - Mac 154 MB
How to defeat a demon lord - demo.apk 244 MB

Development log


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I liked this when it came out and I still check on it from time to time hehe, is it going to be continued? I'd love to see where the story goes but the rest of your artwork is amazing too

Not in the nearest future, I've got other ideas I'd like to explore 
I may get back to it one day, but I don't promise anything

Don't worry hehe, I hope you're doing great!

ah, this was such a nice demo. hope to see more of it, its quite fun to play!

is it still being worked on?

A lot of stuff happened and I'm planning on reworking this project from scratch

awww, alright take your time I loved the demo so im sure the rework is worth the wait


Cute artwork, but I can't tell the men from the women. The men's pecs look like breasts

I just can't wait for the full release ^^

hi is this still being made? how long is the demo

I'm steadily working on it and the demo is quite short.

When will the full release be available?


I'm working on the game in my free time and it's hard for me to tell when I'll be done '^^

Holy cow, loved the demo! I love the style! The art is amazing and the protagonist is adorable! Can't wait to play the full game!

I enjoyed the demo so far, looking forward to the full game ovo I'm actually kinda interested in what role the knight at the beginning will play since she has a full sprite...

My favorite has been the first son so far, can't wait to see more!



This sounds amazing and fun!


It looks adorable right?!