diff --git a/dat/sokoban.des b/dat/sokoban.des
new file mode 100644
index 000000000..56f04e3a4
--- /dev/null
+++ b/dat/sokoban.des
@@ -0,0 +1,618 @@
+#	SCCS Id: @(#)sokoban.des	3.3	99/03/15
+#	Copyright (c) 1998-1999 by Kevin Hugo
+# NetHack may be freely redistributed.  See license for details.
+#
+# In case you haven't played the game Sokoban, you'll learn
+# quickly.  This branch isn't particularly difficult, just time
+# consuming.  Some players may wish to skip this branch.
+#
+# The following actions are currently permitted without penalty:
+#   Carrying or throwing a boulder already in inventory
+#     (player or nonplayer).
+#   Teleporting boulders.
+#   Digging in the floor.
+# The following actions are permitted, but with a luck penalty:
+#   Breaking boulders.
+#   Stone-to-fleshing boulders.
+#   Creating new boulders (e.g., with a scroll of earth).
+#   Jumping.
+#   Being pulled by a thrown iron ball.
+#   Hurtling through the air from Newton's 3rd law.
+#   Squeezing past boulders when naked or as a giant.
+# These actions are not permitted:
+#   Moving diagonally between two boulders and/or walls.
+#   Pushing a boulder diagonally.
+#   Picking up boulders (player or nonplayer).
+#   Digging or walking through walls.
+#   Teleporting within levels or between levels of this branch.
+#   Using cursed potions of gain level.
+#   Escaping a pit/hole (e.g., by flying, levitation, or
+#     passing a dexterity check).
+#   Bones files are not permitted.
+
+
+### Bottom (first) level of Sokoban ###
+MAZE:"soko4-1",' '
+FLAGS:noteleport,hardfloor
+GEOMETRY:center,center
+#12345678901234567890123456789012345678901234567890
+MAP
+------  ----- 
+|....|  |...| 
+|....----...| 
+|...........| 
+|..|-|.|-|..| 
+---------|.---
+|......|.....|
+|..----|.....|
+--.|   |.....|
+ |.|---|.....|
+ |...........|
+ |..|---------
+ ----         
+ENDMAP
+BRANCH:(06,04,06,04),(0,0,0,0)
+STAIR:(06,06),up
+REGION:(00,00,13,12),lit,"ordinary"
+NON_DIGGABLE:(00,00,13,12)
+NON_PASSWALL:(00,00,13,12)
+
+# Boulders
+OBJECT:'`',"boulder",(02,02)
+OBJECT:'`',"boulder",(02,03)
+#
+OBJECT:'`',"boulder",(10,02)
+OBJECT:'`',"boulder",(09,03)
+OBJECT:'`',"boulder",(10,04)
+#
+OBJECT:'`',"boulder",(08,07)
+OBJECT:'`',"boulder",(09,08)
+OBJECT:'`',"boulder",(09,09)
+OBJECT:'`',"boulder",(08,10)
+OBJECT:'`',"boulder",(10,10)
+
+# Traps
+TRAP:"pit",(03,06)
+TRAP:"pit",(04,06)
+TRAP:"pit",(05,06)
+TRAP:"pit",(02,08)
+TRAP:"pit",(02,09)
+TRAP:"pit",(04,10)
+TRAP:"pit",(05,10)
+TRAP:"pit",(06,10)
+TRAP:"pit",(07,10)
+
+# A little help
+OBJECT:'?',"earth",(02,11)
+OBJECT:'?',"earth",(03,11)
+
+# Random objects
+OBJECT:'%',random,random
+OBJECT:'%',random,random
+OBJECT:'%',random,random
+OBJECT:'%',random,random
+OBJECT:'=',random,random
+OBJECT:'/',random,random
+
+
+MAZE:"soko4-2",' '
+FLAGS:noteleport,hardfloor
+GEOMETRY:center,center
+#12345678901234567890123456789012345678901234567890
+MAP
+-------- ------
+|.|....|-|....|
+|.|-..........|
+|.||....|.....|
+|.||....|.....|
+|.|-----|.-----
+|.|    |......|
+|.-----|......|
+|.............|
+|..|---|......|
+----   --------
+ENDMAP
+BRANCH:(03,01,03,01),(0,0,0,0)
+STAIR:(01,01),up
+REGION:(00,00,14,10),lit,"ordinary"
+NON_DIGGABLE:(00,00,14,10)
+NON_PASSWALL:(00,00,14,10)
+
+# Boulders
+OBJECT:'`',"boulder",(05,02)
+OBJECT:'`',"boulder",(06,02)
+OBJECT:'`',"boulder",(06,03)
+OBJECT:'`',"boulder",(07,03)
+#
+OBJECT:'`',"boulder",(09,05)
+OBJECT:'`',"boulder",(10,03)
+OBJECT:'`',"boulder",(11,02)
+OBJECT:'`',"boulder",(12,03)
+#
+OBJECT:'`',"boulder",(07,08)
+OBJECT:'`',"boulder",(08,08)
+OBJECT:'`',"boulder",(09,08)
+OBJECT:'`',"boulder",(10,08)
+
+# Traps
+TRAP:"pit",(01,02)
+TRAP:"pit",(01,03)
+TRAP:"pit",(01,04)
+TRAP:"pit",(01,05)
+TRAP:"pit",(01,06)
+TRAP:"pit",(01,07)
+TRAP:"pit",(03,08)
+TRAP:"pit",(04,08)
+TRAP:"pit",(05,08)
+TRAP:"pit",(06,08)
+
+# A little help
+OBJECT:'?',"earth",(01,09)
+OBJECT:'?',"earth",(02,09)
+
+# Random objects
+OBJECT:'%',random,random
+OBJECT:'%',random,random
+OBJECT:'%',random,random
+OBJECT:'%',random,random
+OBJECT:'=',random,random
+OBJECT:'/',random,random
+
+
+### Second level ###
+MAZE:"soko3-1",' '
+FLAGS:noteleport
+GEOMETRY:center,center
+#12345678901234567890123456789012345678901234567890
+MAP
+-----------       -----------
+|....|....|--     |.........|
+|....|......|     |.........|
+|.........|--     |.........|
+|....|....|       |.........|
+|-.---------      |.........|
+|....|.....|      |.........|
+|....|.....|      |.........|
+|..........|      |.........|
+|....|.....|---------------+|
+|....|......................|
+-----------------------------
+ENDMAP
+STAIR:(11,02),down
+STAIR:(23,04),up
+DOOR:locked,(27,09)
+REGION:(00,00,28,11),lit,"ordinary"
+NON_DIGGABLE:(00,00,28,11)
+NON_PASSWALL:(00,00,28,11)
+
+# Boulders
+OBJECT:'`',"boulder",(03,02)
+OBJECT:'`',"boulder",(04,02)
+#
+OBJECT:'`',"boulder",(06,02)
+OBJECT:'`',"boulder",(06,03)
+OBJECT:'`',"boulder",(07,02)
+#
+OBJECT:'`',"boulder",(03,06)
+OBJECT:'`',"boulder",(02,07)
+OBJECT:'`',"boulder",(03,07)
+OBJECT:'`',"boulder",(03,08)
+OBJECT:'`',"boulder",(02,09)
+OBJECT:'`',"boulder",(03,09)
+OBJECT:'`',"boulder",(04,09)
+#
+OBJECT:'`',"boulder",(06,07)
+OBJECT:'`',"boulder",(06,09)
+OBJECT:'`',"boulder",(08,07)
+OBJECT:'`',"boulder",(08,10)
+OBJECT:'`',"boulder",(09,08)
+OBJECT:'`',"boulder",(09,09)
+OBJECT:'`',"boulder",(10,07)
+OBJECT:'`',"boulder",(10,10)
+
+# Traps
+TRAP:"hole",(12,10)
+TRAP:"hole",(13,10)
+TRAP:"hole",(14,10)
+TRAP:"hole",(15,10)
+TRAP:"hole",(16,10)
+TRAP:"hole",(17,10)
+TRAP:"hole",(18,10)
+TRAP:"hole",(19,10)
+TRAP:"hole",(20,10)
+TRAP:"hole",(21,10)
+TRAP:"hole",(22,10)
+TRAP:"hole",(23,10)
+TRAP:"hole",(24,10)
+TRAP:"hole",(25,10)
+TRAP:"hole",(26,10)
+
+# Random objects
+OBJECT:'%',random,random
+OBJECT:'%',random,random
+OBJECT:'%',random,random
+OBJECT:'%',random,random
+OBJECT:'=',random,random
+OBJECT:'/',random,random
+
+
+MAZE:"soko3-2",' '
+FLAGS:noteleport
+GEOMETRY:center,center
+#12345678901234567890123456789012345678901234567890
+MAP
+ ----          -----------
+-|..|-------   |.........|
+|..........|   |.........|
+|..-----.-.|   |.........|
+|..|...|...|   |.........|
+|.........-|   |.........|
+|.......|..|   |.........|
+|.----..--.|   |.........|
+|........|.--  |.........|
+|.---.-.....------------+|
+|...|...-................|
+|.........----------------
+----|..|..|               
+    -------               
+ENDMAP
+STAIR:(03,01),down
+STAIR:(20,04),up
+DOOR:locked,(24,09)
+REGION:(00,00,25,13),lit,"ordinary"
+NON_DIGGABLE:(00,00,25,13)
+NON_PASSWALL:(00,00,25,13)
+
+# Boulders
+OBJECT:'`',"boulder",(02,03)
+OBJECT:'`',"boulder",(08,03)
+OBJECT:'`',"boulder",(09,04)
+OBJECT:'`',"boulder",(02,05)
+OBJECT:'`',"boulder",(04,05)
+OBJECT:'`',"boulder",(09,05)
+OBJECT:'`',"boulder",(02,06)
+OBJECT:'`',"boulder",(05,06)
+OBJECT:'`',"boulder",(06,07)
+OBJECT:'`',"boulder",(03,08)
+OBJECT:'`',"boulder",(07,08)
+OBJECT:'`',"boulder",(05,09)
+OBJECT:'`',"boulder",(10,09)
+OBJECT:'`',"boulder",(07,10)
+OBJECT:'`',"boulder",(10,10)
+OBJECT:'`',"boulder",(03,11)
+
+# Traps
+TRAP:"hole",(12,10)
+TRAP:"hole",(13,10)
+TRAP:"hole",(14,10)
+TRAP:"hole",(15,10)
+TRAP:"hole",(16,10)
+TRAP:"hole",(17,10)
+TRAP:"hole",(18,10)
+TRAP:"hole",(19,10)
+TRAP:"hole",(20,10)
+TRAP:"hole",(21,10)
+TRAP:"hole",(22,10)
+TRAP:"hole",(23,10)
+
+# Random objects
+OBJECT:'%',random,random
+OBJECT:'%',random,random
+OBJECT:'%',random,random
+OBJECT:'%',random,random
+OBJECT:'=',random,random
+OBJECT:'/',random,random
+
+
+### Third level ###
+MAZE:"soko2-1",' '
+FLAGS:noteleport
+GEOMETRY:center,center
+#12345678901234567890123456789012345678901234567890
+MAP
+--------------------
+|........|...|.....|
+|.....-..|.-.|.....|
+|..|.....|...|.....|
+|-.|..-..|.-.|.....|
+|...--.......|.....|
+|...|...-...-|.....|
+|...|..|...--|.....|
+|-..|..|----------+|
+|..................|
+|...|..|------------
+--------            
+ENDMAP
+STAIR:(06,10),down
+STAIR:(16,04),up
+DOOR:locked,(18,08)
+REGION:(00,00,19,11),lit,"ordinary"
+NON_DIGGABLE:(00,00,19,11)
+NON_PASSWALL:(00,00,19,11)
+
+# Boulders
+OBJECT:'`',"boulder",(02,02)
+OBJECT:'`',"boulder",(03,02)
+#
+OBJECT:'`',"boulder",(05,03)
+OBJECT:'`',"boulder",(07,03)
+OBJECT:'`',"boulder",(07,02)
+OBJECT:'`',"boulder",(08,02)
+#
+OBJECT:'`',"boulder",(10,03)
+OBJECT:'`',"boulder",(11,03)
+#
+OBJECT:'`',"boulder",(02,07)
+OBJECT:'`',"boulder",(02,08)
+OBJECT:'`',"boulder",(03,09)
+#
+OBJECT:'`',"boulder",(05,07)
+OBJECT:'`',"boulder",(06,06)
+
+# Traps
+TRAP:"hole",(08,09)
+TRAP:"hole",(09,09)
+TRAP:"hole",(10,09)
+TRAP:"hole",(11,09)
+TRAP:"hole",(12,09)
+TRAP:"hole",(13,09)
+TRAP:"hole",(14,09)
+TRAP:"hole",(15,09)
+TRAP:"hole",(16,09)
+TRAP:"hole",(17,09)
+
+# Random objects
+OBJECT:'%',random,random
+OBJECT:'%',random,random
+OBJECT:'%',random,random
+OBJECT:'%',random,random
+OBJECT:'=',random,random
+OBJECT:'/',random,random
+
+
+MAZE:"soko2-2",' '
+FLAGS:noteleport
+GEOMETRY:center,center
+#12345678901234567890123456789012345678901234567890
+MAP
+  --------          
+--|.|....|          
+|........|----------
+|.-...-..|.|.......|
+|...-......|.......|
+|.-....|...|.......|
+|....-.--.-|.......|
+|..........|.......|
+|.--...|...|.......|
+|....-.|---|.......|
+--|....|----------+|
+  |................|
+  ------------------
+ENDMAP
+STAIR:(06,11),down
+STAIR:(15,06),up
+DOOR:locked,(18,10)
+REGION:(00,00,19,12),lit,"ordinary"
+NON_DIGGABLE:(00,00,19,12)
+NON_PASSWALL:(00,00,19,12)
+
+# Boulders
+OBJECT:'`',"boulder",(04,02)
+OBJECT:'`',"boulder",(04,03)
+OBJECT:'`',"boulder",(05,03)
+OBJECT:'`',"boulder",(07,03)
+OBJECT:'`',"boulder",(08,03)
+OBJECT:'`',"boulder",(02,04)
+OBJECT:'`',"boulder",(03,04)
+OBJECT:'`',"boulder",(05,05)
+OBJECT:'`',"boulder",(06,06)
+OBJECT:'`',"boulder",(09,06)
+OBJECT:'`',"boulder",(03,07)
+OBJECT:'`',"boulder",(04,07)
+OBJECT:'`',"boulder",(07,07)
+OBJECT:'`',"boulder",(06,09)
+OBJECT:'`',"boulder",(05,10)
+OBJECT:'`',"boulder",(05,11)
+
+# Traps
+TRAP:"hole",(07,11)
+TRAP:"hole",(08,11)
+TRAP:"hole",(09,11)
+TRAP:"hole",(10,11)
+TRAP:"hole",(11,11)
+TRAP:"hole",(12,11)
+TRAP:"hole",(13,11)
+TRAP:"hole",(14,11)
+TRAP:"hole",(15,11)
+TRAP:"hole",(16,11)
+TRAP:"hole",(17,11)
+
+# Random objects
+OBJECT:'%',random,random
+OBJECT:'%',random,random
+OBJECT:'%',random,random
+OBJECT:'%',random,random
+OBJECT:'=',random,random
+OBJECT:'/',random,random
+
+
+### Top (last) level of Sokoban ###
+MAZE:"soko1-1",' '
+FLAGS:noteleport
+GEOMETRY:center,center
+#12345678901234567890123456789012345678901234567890
+MAP
+--------------------------
+|........................|
+|.......|---------------.|
+-------.------         |.|
+ |...........|         |.|
+ |...........|         |.|
+--------.-----         |.|
+|............|         |.|
+|............|         |.|
+-----.--------   ------|.|
+ |..........|  --|.....|.|
+ |..........|  |.+.....|.|
+ |.........|-  |-|.....|.|
+-------.----   |.+.....+.|
+|........|     |-|.....|--
+|........|     |.+.....|  
+|...|-----     --|.....|  
+-----            -------  
+ENDMAP
+RANDOM_PLACES:(16,11),(16,13),(16,15)
+STAIR:(01,01),down
+REGION:(00,00,25,17),lit,"ordinary"
+NON_DIGGABLE:(00,00,25,17)
+NON_PASSWALL:(00,00,25,17)
+
+# Boulders
+OBJECT:'`',"boulder",(03,05)
+OBJECT:'`',"boulder",(05,05)
+OBJECT:'`',"boulder",(07,05)
+OBJECT:'`',"boulder",(09,05)
+OBJECT:'`',"boulder",(11,05)
+#
+OBJECT:'`',"boulder",(04,07)
+OBJECT:'`',"boulder",(04,08)
+OBJECT:'`',"boulder",(06,07)
+OBJECT:'`',"boulder",(09,07)
+OBJECT:'`',"boulder",(11,07)
+#
+OBJECT:'`',"boulder",(03,12)
+OBJECT:'`',"boulder",(04,10)
+OBJECT:'`',"boulder",(05,12)
+OBJECT:'`',"boulder",(06,10)
+OBJECT:'`',"boulder",(07,11)
+OBJECT:'`',"boulder",(08,10)
+OBJECT:'`',"boulder",(09,12)
+#
+OBJECT:'`',"boulder",(03,14)
+
+# Traps
+TRAP:"hole",(08,01)
+TRAP:"hole",(09,01)
+TRAP:"hole",(10,01)
+TRAP:"hole",(11,01)
+TRAP:"hole",(12,01)
+TRAP:"hole",(13,01)
+TRAP:"hole",(14,01)
+TRAP:"hole",(15,01)
+TRAP:"hole",(16,01)
+TRAP:"hole",(17,01)
+TRAP:"hole",(18,01)
+TRAP:"hole",(19,01)
+TRAP:"hole",(20,01)
+TRAP:"hole",(21,01)
+TRAP:"hole",(22,01)
+TRAP:"hole",(23,01)
+
+# Random objects
+OBJECT:'%',random,random
+OBJECT:'%',random,random
+OBJECT:'%',random,random
+OBJECT:'%',random,random
+OBJECT:'=',random,random
+OBJECT:'/',random,random
+
+# Rewards
+DOOR:locked,(23,13)
+DOOR:closed,(17,11)
+DOOR:closed,(17,13)
+DOOR:closed,(17,15)
+REGION:(18,10,22,16),lit,"zoo",filled,true
+OBJECT:'(',"bag of holding",place[0]
+ENGRAVING:place[0],burn,"Elbereth"
+
+
+MAZE:"soko1-2",' '
+FLAGS:noteleport
+GEOMETRY:center,center
+#12345678901234567890123456789012345678901234567890
+MAP
+  ------------------------
+  |......................|
+  |..-------------------.|
+----.|    -----        |.|
+|..|.--  --...|        |.|
+|.....|--|....|        |.|
+|.....|..|....|        |.|
+--....|......--        |.|
+ |.......|...|   ------|.|
+ |....|..|...| --|.....|.|
+ |....|--|...| |.+.....|.|
+ |.......|..-- |-|.....|.|
+ ----....|.--  |.+.....+.|
+    ---.--.|   |-|.....|--
+     |.....|   |.+.....|  
+     |..|..|   --|.....|  
+     -------     -------  
+ENDMAP
+RANDOM_PLACES:(16,10),(16,12),(16,14)
+STAIR:(06,15),down
+REGION:(00,00,25,16),lit,"ordinary"
+NON_DIGGABLE:(00,00,25,16)
+NON_PASSWALL:(00,00,25,16)
+
+# Boulders
+OBJECT:'`',"boulder",(04,04)
+OBJECT:'`',"boulder",(02,06)
+OBJECT:'`',"boulder",(03,06)
+OBJECT:'`',"boulder",(04,07)
+OBJECT:'`',"boulder",(05,07)
+OBJECT:'`',"boulder",(02,08)
+OBJECT:'`',"boulder",(05,08)
+OBJECT:'`',"boulder",(03,09)
+OBJECT:'`',"boulder",(04,09)
+OBJECT:'`',"boulder",(03,10)
+OBJECT:'`',"boulder",(05,10)
+OBJECT:'`',"boulder",(06,12)
+#
+OBJECT:'`',"boulder",(07,14)
+#
+OBJECT:'`',"boulder",(11,05)
+OBJECT:'`',"boulder",(12,06)
+OBJECT:'`',"boulder",(10,07)
+OBJECT:'`',"boulder",(11,07)
+OBJECT:'`',"boulder",(10,08)
+OBJECT:'`',"boulder",(12,09)
+OBJECT:'`',"boulder",(11,10)
+
+# Traps
+TRAP:"hole",(05,01)
+TRAP:"hole",(06,01)
+TRAP:"hole",(07,01)
+TRAP:"hole",(08,01)
+TRAP:"hole",(09,01)
+TRAP:"hole",(10,01)
+TRAP:"hole",(11,01)
+TRAP:"hole",(12,01)
+TRAP:"hole",(13,01)
+TRAP:"hole",(14,01)
+TRAP:"hole",(15,01)
+TRAP:"hole",(16,01)
+TRAP:"hole",(17,01)
+TRAP:"hole",(18,01)
+TRAP:"hole",(19,01)
+TRAP:"hole",(20,01)
+TRAP:"hole",(21,01)
+TRAP:"hole",(22,01)
+
+
+# Random objects
+OBJECT:'%',random,random
+OBJECT:'%',random,random
+OBJECT:'%',random,random
+OBJECT:'%',random,random
+OBJECT:'=',random,random
+OBJECT:'/',random,random
+
+# Rewards
+DOOR:locked,(23,12)
+DOOR:closed,(17,10)
+DOOR:closed,(17,12)
+DOOR:closed,(17,14)
+REGION:(18,09,22,15),lit,"zoo",filled,true
+OBJECT:'"',"amulet of reflection",place[0]
+ENGRAVING:place[0],burn,"Elbereth"