added entries

games/action/_toc.md

@@ -2,6 +2,7 @@
 
 [comment]: # (start of autogenerated content, do not edit)
 - **[Astromenace](astromenace.md)** (C++, C, GPL-3.0, mature)
+- **[Boulder Dash](boulder_dash.md)** (Java, MIT, mature, inactive since 2015)
 - **[Cat Mother Dead Justice](catmother.md)** (C++, BSD, beta, inactive since 2003)
 - **[CommandoJS](commando_js.md)** (JavaScript, CoffeeScript, MIT, beta, inactive since 2012)
 - **[Epiar](epiar.md)** (C, C++, Lua, GPL-2.0, beta)
@@ -19,5 +20,6 @@
 - **[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, mature)
+- **[xdigger](xdigger.md)** (C, GPL-2.0, mature, inactive since 1999)
 
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games/action/boulder_dash.md

@@ -0,0 +1,14 @@
+# Boulder Dash
+
+_Boulder Dash game remake, done in Java._
+
+- Home: https://github.com/valeriansaliou/boulder-dash
+- State: mature, inactive since 2015
+- Download: https://github.com/valeriansaliou/boulder-dash/releases
+- Code repository: https://github.com/valeriansaliou/boulder-dash
+- Code language: Java
+- Code license: MIT
+
+## Building
+
+

games/action/xdigger.md

@@ -0,0 +1,14 @@
+# xdigger
+
+_(KC85-)Digger game._
+
+- Home: https://www.gsp.com/cgi-bin/man.cgi?section=6&topic=xdigger#9
+- State: mature, inactive since 1999
+- Download: https://launchpad.net/debian/+source/xdigger
+- Platform: Linux
+- Code repository: (see download)
+- Code language: C
+- Code license: GPL-2.0
+
+## Building
+