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games/action/_toc.md

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 # Action/Arcade games
 
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+- **[Astromenace](atromenace.md)** (C++, C, GPL-3.0, mature)
 - **[CommandoJS](commando_js.md)** (Javascript, Coffeescript, MIT, beta, inactive since 2012)
 - **[Epiar](epiar.md)** (C, C++, Lua, beta)
 - **[GDash](gdash.md)** (C++, MIT, beta)
+- **[Linwarrior 3D](linwarrior.md)** (C++, Apache-2.0, mature, inactive since 2010)
+- **[MechCommander 2 Omnitech](mechcommander2_omnitech.md)** (C++, MPL, beta, inactive since 2013)
+- **[Open Sonic](open_sonic.md)** (C, GPL-2.0, beta)
+- **[Open Zelda](open_zelda.md)** (C++, zlib, beta)
+- **[Red Eclipse](red_eclipse.md)** (C++, Zlib, mature)
 - **[Rocks'n'Diamonds ](rocks_and_diamonds.md)** (C, GPL-2.0, mature)
+- **[Secret Mario Chronicles](secret_mario_chronicles.md)** (C++, GPL-3.0, mature, inactive since 2009)
 - **[Smash](smash.md)** (Javascript, MIT, mature)
+- **[Speed Dreams](speed_dreams.md)** (C++, GPL-2.0, mature)
+- **[SuperTuxKart](super_tux_kart.md)** (C++, C, GPL-3.0, mature)
+- **[Tux Racer](tuxracer.md)** (C, GPL-2.0, beta, inactive since 2001)
+- **[Xonotic](xonotic.md)** (C, GPL-3.0 (Darkplace engine is GPL-2.0), mature)
 
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games/action/atromenace.md

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+# Astromenace
+
+_3D space scroll-shooter with spaceship upgrade possibilities._
+
+- Home: https://www.viewizard.com/
+- Download: https://www.viewizard.com/download.html
+- State: mature
+- Keywords: shooter
+- Code: https://github.com/viewizard/astromenace
+- Language(s): C++, C
+- License: GPL-3.0
+
+## Building
+
+Uses CMake

games/action/linwarrior.md

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+# Linwarrior 3D
+
+_Mech Simulation Game - since 1999._
+
+- Home: http://www.hackcraft.de/games/linwarrior_3d/index.htm
+- Download: http://www.hackcraft.de/games/linwarrior_3d/downloads.htm
+- State: mature, inactive since 2010
+- Code: https://github.com/hackcraft-de/linwarrior
+- Language(s): C++
+- License: Apache-2.0
+
+## Building
+

games/action/mechcommander2_omnitech.md

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+# MechCommander 2 Omnitech
+
+_Upgraded and more easily moddable version of the good old Mechcommander 2._
+
+- Home: https://github.com/Echelon9/mechcommander2-open, http://www.hard-light.net/forums/index.php?board=210.0
+- Media: https://en.wikipedia.org/wiki/MechCommander_2
+- State: beta, inactive since 2013
+- Keywords: {XX}
+- Code: http://www.hard-light.net/forums/index.php?board=210.0
+- Language(s): C++
+- License: MPL
+
+## Building
+

games/action/open_sonic.md

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+# Open Sonic
+
+_Game based on the "Sonic the Hedgehog" universe._
+
+- Home: http://opensnc.sourceforge.net/home/index.php, http://opensnc.sourceforge.net/forum/index.php
+- Download: http://opensnc.sourceforge.net/home/download.php
+- State: beta
+- Code: https://sourceforge.net/p/opensnc/code/HEAD/tree/
+- Language(s): C
+- License: GPL-2.0
+
+Renamed to Open Surge.
+
+## Building
+

games/action/open_zelda.md

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+# Open Zelda
+
+_Open Zelda Game Development Software._
+
+- Home: https://github.com/openzelda/openzelda-source
+- State: beta
+- Keywords: requires original content
+- Code: https://github.com/openzelda/openzelda-source
+- Language(s): C++
+- License: zlib
+
+## Building
+

games/action/red_eclipse.md

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+# Red Eclipse
+
+_First person arena shooter, featuring parkour, impulse boosts, and more._
+
+- Home: https://www.redeclipse.net/
+- Download: https://www.redeclipse.net/download
+- State: mature
+- Keywords: shooter
+- Code: https://github.com/red-eclipse
+- Language(s): C++
+- License: Zlib
+
+## Building
+

games/action/secret_mario_chronicles.md

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+# Secret Mario Chronicles
+
+_Jump and Run game like Super Mario World with an advanced Editor._
+
+- Home: https://sourceforge.net/projects/smclone/
+- Media: https://en.wikipedia.org/wiki/Secret_Maryo_Chronicles
+- Download: https://sourceforge.net/projects/smclone/files
+- State: mature, inactive since 2009
+- Keywords: platform
+- Code: see download
+- Language(s): C++
+- License: GPL-3.0
+
+## Building
+

games/action/speed_dreams.md

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+# Speed Dreams
+
+_Motorsport Simulator featuring high-quality 3D graphics and an accurate physics engine._
+
+- Home: http://www.speed-dreams.org/, https://sourceforge.net/projects/speed-dreams/
+- Download: http://www.speed-dreams.org/#download
+- State: mature
+- Keywords: racing
+- Code: https://sourceforge.net/p/speed-dreams/code/HEAD/tree/ (svn)
+- Language(s): C++
+- License: GPL-2.0
+
+## Building
+
+Uses CMake

games/action/super_tux_kart.md

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+# SuperTuxKart
+
+_Kart racing game._
+
+- Home: https://supertuxkart.net/Main_Page, https://sourceforge.net/projects/supertuxkart/
+- Download: https://supertuxkart.net/Download
+- State: mature
+- Keywords: racing
+- Code: https://sourceforge.net/p/supertuxkart/code/HEAD/tree/ (svn), https://github.com/supertuxkart/stk-code
+- Language(s): C++, C
+- License: GPL-3.0
+
+## Building
+

games/action/tuxracer.md

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+# Tux Racer
+
+_Racing game featuring Tux, the Linux Penguin._
+
+- Home: http://tuxracer.sourceforge.net/, https://sourceforge.net/projects/tuxracer/
+- Media: https://en.wikipedia.org/wiki/Tux_Racer
+- Download: https://sourceforge.net/projects/tuxracer/files/
+- State: beta, inactive since 2001
+- Keywords: racing
+- Code: https://sourceforge.net/p/tuxracer/code/ (cvs)
+- Language(s): C
+- License: GPL-2.0
+
+## Building
+

games/action/xonotic.md

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+# Xonotic
+
+_Arena-style first person shooter._
+
+- Home: http://www.xonotic.org/
+- Media: https://en.wikipedia.org/wiki/Xonotic
+- Download: http://www.xonotic.org/download/
+- State: mature
+- Keywords: shooter
+- Code: https://gitlab.com/xonotic
+- Language(s): C
+- License: GPL-3.0 (Darkplace engine is GPL-2.0)
+
+## Building
+