Taiwanese publisher Mango Party has announced that Sister Leticia: The First Mission!, an adult 2D side-scrolling action game from developer Cyatt Cafe, is now available on Steam. It is pixel-art exorcism with a sacred staff and a handgun, and getting grabbed by a monster means being violated right there on the spot. The game ships with five languages (Traditional Chinese, Simplified Chinese, English, Japanese and Korean) plus Japanese voice acting

The Steam release builds on the original DLsite version, adding voice acting and character art and reworking the H scenes, so players get a fuller experience than the first release
A monastery goes silent, and the rookie nun draws the short straw
“Boo-hoo… Why did I have to be assigned to this?!”
A monastery has suddenly lost contact with the outside world, and Leticia, a rookie nun from the Exorcism Division, is sent to find out why. On arrival she discovers the village has already been overrun by monsters, and the deeper she digs, the stranger things get. Will Leticia make it home safely


Staff, handgun or submachine gun, swap on the fly to purify the naughty monsters
Combat is 2D side-scrolling. You guide Leticia as she sneaks into the monster-infested village to investigate, and depending on each enemy’s traits, you can switch between the sacred staff, the handgun and the submachine gun at any moment to pick the right tool for the fight


Goblins, rafflesia, orcs, ghosts and devils, nine monster types waiting to grab her
There are nine enemy types in total, including goblins, rafflesia, orcs, ghosts and devils, each with its own movement pattern and quirks. Let your guard down and get caught, and Leticia is violated by the monsters on the spot
Every monster type has its own pixel H animation, and depending on how many enemies are around, group scenes can play out as well
25 pixel H animations with 9 full-screen defeat animations, all in the gallery
H scenes come in two kinds. One is the real-time pixel H animation that plays mid-battle, the other is the full-screen defeat animation you get after losing to a given monster. Together that adds up to 25 sets, nine of which are full-screen defeat animations
You never have to throw a fight just to see a scene. Everything is collected in the gallery, where you can take your time and flip through the different variants
Meet the cast

Leticia, rookie nun of the Exorcism Division
A rookie nun in the Church, serving in the Exorcism Division with monster hunting as her duty. She is nervous and distrustful by nature, yet remarkably decisive once she is carrying out orders. Timid as she usually is, she can accept even the most bizarre situation in an instant, almost as if she flips into another personality
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Veronia, Leticia’s partner
Leticia’s partner, who provides support while Leticia is out in the field. She comes across as serious, but every so often she lets a sharp joke slip. Underneath it all she genuinely cares about Leticia
Event scene preview
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Product information
| Title | Sister Leticia: The First Mission! / 新人シスター・リティシア / 新人修女蕾蒂希雅 |
|---|---|
| Genre | 2D side-scrolling platform action |
| Developer | Cyatt Cafe |
| Publisher | Mango Party (Steam) (X) (Facebook) (Instagram) (YouTube) (Discord) |
| Languages | Traditional Chinese, Simplified Chinese, English, Japanese, Korean |
| Voice acting | Japanese |
| Platform | Steam |
| Release date | September 16, 2026 |
Where to Buy Sister Leticia: The First Mission!
Steam: Buy Sister Leticia: The First Mission! on Steam
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