new entries and updates

games/rpg/_toc.md

@@ -34,6 +34,7 @@
 - **[Imperium](imperium.md)** (mature)
 - **[KQ Lives](kq_lives.md)** (C, GPL-2.0, beta, inactive since 2011)
 - **[Kobold's Quest 2](kobolds_quest_2.md)** (Python, LGPL-3.0, beta, inactive since 2011)
+- **[Labyrinth of Worlds](labyrinth_of_worlds.md)** (C++, beta, inactive since 2010)
 - **[Land of Fire](land_of_fire.md)** ()
 - **[Lips of Suna](lips_of_suna.md)** (C, beta, inactive since 2014)
 - **[Meridian 59](meridian59.md)** (C++, C, mature)
@@ -56,6 +57,7 @@
 - **[The Mana World](manaworld.md)** (PHP)
 - **[Trinity Reign](trinity_reign.md)** (C++, beta, inactive since 2013)
 - **[Umbra](umbra.md)** (Python, beta, inactive since 2002)
+- **[Underworld Adventures](underworld_adventures.md)** (C++, Lua, GPL-2.0, beta, inactive since 2006)
 - **[Valyria Tear](valyria_tear.md)** (Lua, C++, C)
 - **[VegaTrek](vegatrek.md)** (beta, inactive since 2013)
 - **[Waste's Edge](wastes_edge.md)** (Python, GPL-2.0, beta)

games/rpg/labyrinth_of_worlds.md

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+# Labyrinth of Worlds
+
+_Rewrite for modern architectures of the incredibly good game Ultima Underworld 2: Labyrinth of Worlds._
+
+- Home: http://low.sourceforge.net/index.php, https://sourceforge.net/projects/low/
+- Download: https://sourceforge.net/projects/low/files
+- State: beta, inactive since 2010
+- Code: https://sourceforge.net/p/low/cvs/ (cvs), https://sourceforge.net/p/low/code/HEAD/tree/ (svn)
+- Language(s): C++
+
+## Building
+

games/rpg/underworld_adventures.md

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+# Underworld Adventures
+
+_Project to recreate Ultima Underworld 1 on modern operating systems (e.g. Win32, Linux or MacOS), using the original game files._
+
+- Home: http://uwadv.sourceforge.net/, https://sourceforge.net/projects/uwadv/
+- Download: http://uwadv.sourceforge.net/index.php?page=download
+- State: beta, inactive since 2006
+- Code: https://sourceforge.net/p/uwadv/code/ (cvs)
+- Language(s): C++, Lua
+- License: GPL-2.0
+
+Requires original game files.
+
+## Building
+