// Game Programmer & Designer · Unity & C# · Germany

Hi, I'm Mark Herdt.
I make games.

Game developer with ~7 years of Unity and C# experience, 2 years as a professional software developer, and a self-published Steam game rated Very Positive by over a thousand players.

Games

Projects I designed and programmed.

Watermelon Game key art▶

Watermelon Game

A casual physics puzzle game: drop and combine matching fruits to score points and beat your high score, with multiplayer / PvP modes. Built solo, released on Steam in November 2023 and also published on the Microsoft Store.

Steam · Very Positive (91%) 1,000+ reviews UnityC# MultiplayerPhysics
Design details →
Rogue Deck cover art▶

Rogue Deck In development

My current project: a 2–4 player card game, as simple as UNO but with deck building and roguelike upgrades. Not released yet, but you can download the current build.

UnityC#RoguelikeCard gameMultiplayer
Design details →
Queue Connect robot▶

Queue Connect

A mobile arcade game: repair robots on a speeding conveyor belt by tapping the right parts before they roll away. Started as our Global Game Jam 2020 entry, then polished with a fellow School of Games student (I did design & programming) and published on the Google Play Store (no longer listed). Still available on itch.io.

UnityC#Google PlayTeam of 2Mobile
Design details →

Unity Tools & Plugins

Open-source tooling I built to speed up Unity development.

CustomScriptTemplates

Unity editor plugin for creating and managing custom script templates.

C#Editor tooling

Utilities

A collection of extension and utility methods for Unity projects.

C#Library

Experience & Education

 

2023 – today

Independent Game Developer

Self-employed projects

Designed, programmed and published Watermelon Game on Steam (Very Positive, 1,000+ reviews). Developing Rogue Deck and open-source Unity plugins.

UnityGame Design.NETC#Marketing
2021 – 2023

Software Developer

5Minds IT-Solutions GmbH & Co. KG

Developed management software for solar plants and solar parks in .NET / C#, as part of a team of around 50 developers.

.NETC#Energy sector
2019 – 2021

Game Programmer (Education)

Two-year game programming and design education; graduated 2021.

UnityGame Design.NETC#

Skills

 

Engine

UnityEditor toolingWebGLMultiplayer

Languages

C#.NET

Tools

JetBrains RiderGit / GitHubSteamworks

Shipping

Steam releasePlay StoreMicrosoft Storeitch.io

About me

I'm a game developer from Germany. I studied game development at the School of Games in Cologne, Germany, then worked for two years as a software developer at 5Minds IT-Solutions, building .NET management software for solar parks as part of a team of about 50.

Since 2023 I've focused fully on my own games: I took Watermelon Game from idea to a Steam release with over a thousand player reviews, and I'm now building Rogue Deck alongside open-source Unity tools.

I'm looking for a team where I can bring that end-to-end experience to bigger projects.

Let's work together

Open to game programming and game design roles. I'm happy to share builds, code samples or my CV.