MedievaLands is an old school multiplayer dungeon crawler with grid-based movement, turn-based combat, and many puzzles and quests to solve in an expansive dungeon that goes deep into the earth and into the timeless beyond. Monsters have awoken in the dungeon of Yserbius and now plague the island of Twinion. Will you rise to the challenge?

Download and play now!


The first footsteps into Twinion

Jan 10, 2020

Hail friends! I am back with another Twinion update. This week started with a brand new UI that allows players to select which game they want to play (Yserbius or Twinion). This was followed by a major refactor of the class that manages the state of the Yserbius 'world', and a reimplementation of that same class for the Twinion world. I am trying to share as much code as possible between Yserbius and Twinion, only differentiating where it is necessary for different game mechanics/assets, and where the architecture of the client/server requires it. It has been ten weeks since work on Twinion began, and this week all the hard work on the reorganization of the original Yserbius-only game began to pay off: I was able to see Twinion graphics and other assets in the character creation, keep, tavern, and street screens. I expect to be done with this first pass soon - and then will be on to bug fixing and adding new features for a grand release of Twinion.

Walkthroughs for Yserbius

Jan 1, 2020

Happy New Year! I've added two walkthroughs for Yserbius to the help page: Sue Medley's Walkthrough, and Tiger's Quests and Items Guide. These guides are an essential reference for returning players looking to refresh their memories, and new players looking to complete the game for the first time. Check them out!

Work begins on Twinion

Oct 27, 2019

I have started remaking Fates of Twinion! When I'm ready, I hope to have both Yserbius and Twinion running seemlessly alongside each other, each with their own dungeon, but sharing a single tavern, forums, and guild system. I expect to have Twinion done early next year. Make sure you are signed up for email updates in the game client if you want to be the first to find out that Twinion is available!


You are an adventurer tasked with delving into Yserbius.

Exchange clues and gather a party in the Tavern.

Defeat Monsters and grow in power.

Explore, quest, and solve the mystery of Yserbius!


Download and Play

MedievaLands is free to play! Download the client for Windows and MacOS here:

If you are running an old version of Windows and see a popup about a missing .NET Framework installation, please download and install .NET Framework 4.6.2 from Microsoft.

IMPORTANT! This is not an official release, just a closed-source hobby project. I do not have the permission of the rights holders or owners of The Shadow of Yserbius or Fates of Twinion.

About the Developer

Hi, this is Zane! I'm the developer of MedievaLands and a fan of the original games, which were created by Ybarra Productions for The Sierra Network. I was one of the many people who played Yserbius and Twinion and fell in love with the welcoming community and a dungeon that seemed to go on forever. MedievaLands, which went live on March 29, 2019, is the culmination of 2,500 hours of work towards remaking this favorite game from my childhood. My hope is that MedievaLands will be a fun adventure for new players and a welcome respite for returning INNers. As it turns out, you can always come home - but sometimes that means you need to rebuild your home from scratch.

A few notes about the application:

This program copies itself to your Documents directory under /Games/CommunityKit. It does this so it can update itself in a known location. Each time the program runs, it checks for updates and automatically patches itself.

The MedievaLands game engine is called CommunityKit and is written in C#, with the server running on .NET Core 2.0, and the client running on the FNA Framework on Windows and Mac. The total server/client codebase is approximately 98,500 lines of code.

The CommunityKit Engine took me seven and a half months to develop from start to release. Including time spent writing framework code not specific to CommunityKit and time spent deciphering the Yserbius data formats and game mechanics, I estimate that I spent 2,500 hours on this remake.

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