Project Kat - Paper Lily Prologue

A psychological horror adventure with multiple ways to solve puzzles

Leef 6010 · Released Oct 15, 2021

Reviews: Overwhelmingly Positive; 99% of 6,692
Recent reviews: Very Positive; 100% of 33 in 30 days
Players: 4; daily peak, Oct 28, 2026
Steam Deck: Verified
Last update on Steam: 1 year ago; Oct 13, 2025
Minimum PC: OpenGL ES 3.0 Compatible; 4 GB RAM · 0.2 GB disk; Full requirements

What is Project Kat - Paper Lily Prologue?

This free, story-based puzzle game is a standalone prologue to Paper Lily, with a premise involving a mysterious golden letter. You explore a school after dark, push desks and pick locks, with your actions determining which ending you reach.

For you if...

+you prefer psychological tension to jump scares

Not for you if...

−you want action-focused horror rather than puzzle solving

What players say

99% of 6,692 reviews are positive · 100% of 33 in the last 30 days

Players praise the pixel art. They also describe the game as very short.

Screenshots and trailer

Project Kat - Paper Lily Prologue screenshot 1

Project Kat - Paper Lily Prologue system requirements

Minimum: OpenGL ES 3.0 Compatible, 4 GB RAM, 0.2 GB of disk space.

As published by the developer.

Can my PC run Project Kat - Paper Lily Prologue?

The published requirements do not name a graphics card we can compare.

Set up my PC →

Minimum

OS: Windows 7 (64-bit) or above
Processor: Intel Core i3 4th generation or above
Graphics: OpenGL ES 3.0 Compatible
Memory: 4 GB RAM
Storage: 150 MB available space

Does Project Kat - Paper Lily Prologue have co-op or multiplayer?

No: single-player only, no multiplayer modes declared.

Single-player

Does Project Kat - Paper Lily Prologue run on Steam Deck?

Verified Yes, Verified by Valve: it works on Steam Deck out of the box.

All functionality is accessible with the default controller configuration
Shows Steam Deck controller icons
In-game text is legible on Steam Deck
Default graphics settings perform well on Steam Deck

PC version details

DRM: None declared on Steam
Controller: Full controller support
Platforms: Windows
Achievements: 10
Steam features: Cloud saves, Family Sharing
Languages: Text only: English, Japanese, French.

Does Project Kat - Paper Lily Prologue use AI-generated content?

No AI-generated content is disclosed on the game's Steam page.

Self-reported by the developer under Steam rules: it covers AI content that ships in the game, not tools used to make it. Steam page checked on Oct 27, 2026. How to filter AI games on Steam