added new entries

games/action/_toc.md

@@ -27,15 +27,22 @@
 - **[Nexiuz](nexiuz.md)** (?, mature)
 - **[Open Sonic](open_sonic.md)** (C, GPL-2.0, beta)
 - **[Open Zelda](open_zelda.md)** (C++, zlib, beta)
+- **[OpenArena](openarena.md)** (C, GPL-2.0, mature, inactive since 2012)
+- **[OpenClonk](openclonk.md)** (C, C++, ISC, mature)
 - **[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)
+- **[Tremulous](tremulous.md)** (C, GPL-2.0, mature, inactive since 2016)
 - **[Tux Racer](tuxracer.md)** (C, GPL-2.0, beta, inactive since 2001)
+- **[UltraStar](ultrastar.md)** (Pascal, ?, mature, inactive since 2010)
 - **[Unvanquished](unvanquished.md)** (C++, GPL-3.0, mature)
+- **[X-Moto](x-moto.md)** (C++, GPL-2.0, mature, inactive since 2014)
+- **[XPilot](xpilot.md)** (C, GPL-2.0, mature, inactive since 2010)
 - **[Xonotic](xonotic.md)** (C, GPL-3.0, mature)
+- **[Yo Frankie!](yo_frankie.md)** (Blender script, ?, mature, inactive since 2009)
 - **[xdigger](xdigger.md)** (C, GPL-2.0, mature, inactive since 1999)
 
 [comment]: # (end of autogenerated content)

games/action/openarena.md

@@ -0,0 +1,17 @@
+# OpenArena
+
+_First-person shooter (FPS), and a video game clone of Quake III Arena._
+
+- Home: http://openarena.ws/smfnews.php
+- Media: https://en.wikipedia.org/wiki/OpenArena
+- State: mature, inactive since 2012
+- Download: http://openarena.ws/download.php
+- Platform: Windows, Linux, macOS
+- Keywords: shooter
+- Code repository: https://github.com/OpenArena/engine.git
+- Code language: C
+- Code license: GPL-2.0
+
+## Building
+
+

games/action/openclonk.md

@@ -0,0 +1,16 @@
+# OpenClonk
+
+_2D action game in which the player controls small but witty and nimble humanoid beings._
+
+- Home: https://www.openclonk.org/
+- Media: https://en.wikipedia.org/wiki/OpenClonk
+- State: mature 
+- Download: https://www.openclonk.org/download/
+- Platform: Windows, Linux
+- Code repository: https://github.com/openclonk/openclonk.git
+- Code language: C, C++
+- Code license: ISC
+
+## Building
+
+- Build system: CMake

games/action/tremulous.md

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+# Tremulous
+
+_Asymmetric team-based first-person shooter with real-time strategy elements._
+
+- Home: http://tremulous.net/
+- Media: https://en.wikipedia.org/wiki/Tremulous
+- State: mature, inactive since 2016 
+- Download: http://tremulous.net/files/
+- Platform: Windows, Linux, macOS
+- Keywords: shooter
+- Code repository: https://github.com/darklegion/tremulous.git
+- Code language: C
+- Code license: GPL-2.0
+- Code dependencies: SDL
+- Assets license: CC-BY-SA-2.5
+
+## Building

games/action/ultrastar.md

@@ -0,0 +1,19 @@
+# UltraStar
+
+_Clone of SingStar, a music video game._
+
+- Home: https://sourceforge.net/projects/ultrastar/
+- Media: https://en.wikipedia.org/wiki/UltraStar
+- State: mature, inactive since 2010
+- Download: https://sourceforge.net/projects/ultrastar/files/
+- Platform: Windows
+- Keywords: karaoke
+- Code repository: https://svn.code.sf.net/p/ultrastar/code/
+- Code language: Pascal
+- Code license: ?
+
+See also [UltraStar Deluxe](https://usdx.eu/) and https://github.com/UltraStar-Deluxe/USDX.
+
+
+## Building
+

games/action/x-moto.md

@@ -0,0 +1,15 @@
+# X-Moto
+
+_2D motocross platform game._
+
+- Home: http://xmoto.tuxfamily.org/, http://xmoto.sourceforge.net/, https://directory.fsf.org/wiki/X-Moto
+- Media: https://en.wikipedia.org/wiki/X-Moto
+- State: mature, inactive since 2014
+- Download: http://xmoto.tuxfamily.org/
+- Platform: Windows, Linux, macOS
+- Keywords: racing
+- Code repository: (https://svn.tuxfamily.org/viewvc.cgi/xmoto_xmoto/ svn)
+- Code language: C++
+- Code license: GPL-2.0
+
+## Building

games/action/xpilot.md

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+# XPilot
+
+_Multi-player 2D space game._
+
+- Home: http://www.xpilot.org/
+- Media: https://en.wikipedia.org/wiki/XPilot
+- State: mature, inactive since 2010
+- Download: https://sourceforge.net/projects/xpilotgame/files/
+- Platform: Windows, Linux
+- Keywords: space
+- Code repository: http://hg.code.sf.net/p/xpilotgame/xpilotgame (hg), http://xpilotgame.cvs.sourceforge.net (cvs)
+- Code language: C
+- Code license: GPL-2.0
+
+See also [XPilot5](http://www.buckosoft.com/xpilot/xpilot5/), [JXPilot](https://sourceforge.net/projects/jxpilot/) or [XPilot-AI](/http://xpilot-ai.org/).
+
+## Building

games/action/yo_frankie.md

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+# Yo Frankie!
+
+_Platform game._
+
+- Home: https://apricot.blender.org/
+- Media: https://en.wikipedia.org/wiki/Yo_Frankie!
+- State: mature, inactive since 2009
+- Download: https://apricot.blender.org/
+- Platform: Windows, Linux, macOS (wherever Blender runs)
+- Code repository: (see download)
+- Code language: Blender script
+- Code license: ?
+- Code dependencies: Blender game engine
+
+## Building