Portrait picture

Simon Parzer

✉ Contact

I am a game programmer located in Vienna, Austria. I love indie games, Tae-Kwon-Do and cooking.

I’m also a part-time teacher for game programming at HTL Spengergasse in Vienna.

I was lead programmer on The Binding of Isaac: Rebirth, a highly acclaimed video game that sold millions of copies on Steam.

Below you can find more projects I’ve worked on.

Also, check out my game jam entries on itch.io and YouTube!

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Castle in the Darkness 2 (2016-202X)

Indie project with Matt Kap (LABS Works)

  • Game engine
  • Gameplay programming
  • 2D animation tool
  • Content creation tools
  • C++/OpenGL, Qt, Python
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Dungreed (2019-2024)

2D roguelike platformer game

  • Nintendo Switch and PS4 port
  • Merged PC/Steam patches with console version
  • Localization tool
  • Upgrade/downgrade between major Unity versions
  • C#, Unity 5.6, Unity 2018, Unity 2020
  • Python, Google Sheets API
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The Binding of Isaac: Rebirth (2013-2021)

2D roguelike twin-stick shooter game

  • Lead a team of 4 programmers
  • C++ port of Flash/AS2 code
  • New enemies, bosses, items
  • New gameplay systems
  • Custom tools and data formats
  • Steam integration
  • New Nintendo 3DS port
  • New game modes for Afterbirth DLC
  • Nintendo Switch port for Repentance DLC
  • C++, OpenGL, Nintendo SDK
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Fatmage (2020-2023)

Webcomic about an overweight wizard

  • 252 fully colored hand-drawn panels
  • English and German versions
  • Custom website, Webtoon Canvas
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Critadel (2021-2022)

2D roguelike platformer game

  • Nintendo Switch port
  • Optimized rendering performance
  • Merged PC/Steam patches with console version
  • Localization tool
  • Game Maker, Python
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The Legend of Bum-Bo (2020-2022)

3D roguelike deck-building puzzle game

  • New features and bugfixes
  • Nintendo Switch port
  • C#, Unity 2020, DOTween
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IR_music App (2015-2024)

Procedural music generation tool

  • Wavetable synthesizer
  • Sequencer
  • MusicXML exporter
  • Video exporter
  • C++, QT, QML
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Crystal Crisis (2018)

3D puzzle fighter multiplayer game

  • Interactive tutorial
  • Bugfixing
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The End Is Nigh (2017)

2D platformer game

  • Nintendo Switch port
  • Optimized shaders and engine
  • Tweaked assets for performance
  • C++, Nintendo SDK
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Irrational Image Generator (2012-2013)

Procedural image generation tool

  • Master’s thesis
  • Generation of nonperiodic tilings
  • Image exporter
  • C++, Qt, OpenGL
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Tiny Barbarian DX (2016-2017)

2D action platformer

  • C# to C++ source code translation
  • Port from XNA to C++ framework
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Llama in Your Face (2012)

Browser game featuring a Llama on a trampoline

  • Programming, custom tools
  • Game design, balancing
  • Project management
  • Flash AS3, Flixel
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Cave Story (2010-2011)

Indie metroidvania platformer game

  • Nintendo DSi port
  • Linux port for Cave Story+
  • Sound system for Cave Story 3D remake
  • Two-player co-op for Nintendo Switch version