Lemma is an immersive first-person parkour game. Every parkour move has the potential to modify the environment. Surfaces pop in and out of existence at will.

All the code and some of the assets for Lemma are open source. Everything you need to create your own single-player campaign is there, including a level editor.

Not really. The project started in 2010 and served as a test bed for a lot of hairbrained ideas I had back then. Consider it an example of what not to do.

1. Install Microsoft Visual C# 2013 and XNA Game Studio 4.0 Refresh.
2. Clone the repository.
3. Open Lemma.sln.
4. Set the active solution configuration to Release.
5. Build and run the solution.
6. On the main menu, hit "switch to edit mode" to open the level editor.

See the Official level editor guide.

To make or edit models, you'll need Blender. The asset pipeline has been tested with Blender 2.70a. Here's how to get started:

1. Install Blender 2.70a.
2. Find the file export_fbx.py in the PipelineExtensions project.
3. Copy the file into the Blender program folder under 2.70\scripts\addons\io_scene_fbx (it should replace an existing file).
4. Open Blender and make sure the FBX export addon is enabled.
5. Open a .blend file and select File -> Export -> Autodesk FBX.
6. Use the following export settings for animations:

The following textures are adapted from CGTextures source images, and are therefore only made available here for modding purposes:

Lemma/Content/Textures/red-rock.png
Lemma/Content/Textures/red-rock-normal.png
Lemma/Content/Textures/rock-grass.png
Lemma/Content/Textures/rock-grass-normal.png
Lemma/Content/Textures/hex.png
Lemma/Content/Textures/hex-normal.png
Lemma/Content/Textures/lattice.png
Lemma/Content/Textures/lattice-normal.png

To use them for your own purposes, you must re-download them from CGTextures and follow their usage guidelines.

The singleplayer game content lives in a closed-source Git submodule. However, everything in this repository not listed in the "Internet Credits" section of attribution.txt is made available under the following license:

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.