Some hints about installation.

Note: this is mostly from memory. I didn't actually test this
as I wrote it but it should be close to what is actually needed
to run this.

readme.md

@@ -69,6 +69,7 @@ about their performance in the box itself, but only on the first
 attempt. The performance includes time spent in the box, times died,
 and damage taken.
 
+
 ## Constructing
 
 Players can construct new boxes. They do this by entering a pristine
@@ -197,3 +198,50 @@ Placement of boxes will use VoxelManips as well as additional metadata
 where needed to connect dynamic elements inside the box. These are
 subsequently connected to assure proper functioning of the box.
 
+
+## Running this game
+
+Runnig this game requires a working copy of `lsqlite3`, which can be
+obtained through `luarocks`, or manually compiled. You will need to
+instal the `lsqite3.so` into a proper location. If you don't have it or
+don't know where to put it, minetest's Lua will tell you where it looks.
+
+The game doesn't require `Minetest Game`. It is a full game, not a
+subgame or modpack. It requires that you create 2 mods manually outside
+the game:
+
+ * `localmusic`
+
+    the `localmusic` mod is designed to keep music out of the git tree
+    and instead local to each server. You can find an example `localmusic`
+    mod as a subfolder of the `music` mod.
+
+ * `ranks`
+
+    the `ranks` mod is optional and is how `itb` gets ranking data back
+    from a backend service. Currently, ranking data is time intensive
+    and takes too long to do in lua, so on the official server this
+    happens in a separate daemon process. The `ranks` mod reads this data
+    back in and exposes it through the `ranks` global table.
+
+Additionally, the `db` mod requires to be added to the `secure.trusted_mods`
+minetest.conf setting:
+
+```
+secure.trusted_mods = db
+```
+
+Optional world settings are:
+
+```
+lobby_respawn_center = (<x>,<y>,<z>) -- where to respawn players who come back
+                                     -- to the lobby
+lobby_respawn_radius = <min>,<max>   -- use this radius around the center
+
+tutorial_required = <true,false>     -- are players required to complete this
+tutorial_series = <id>               -- number of the tutorial series
+tutorial_entry_lobby = <id>          -- tutorial entry lobby box_id
+tutorial_exit_lobby = <id>           -- tutorial exit lobby box_id
+tutorial_exit = (<x>,<y>,<z>)        -- where to teleport player at end of tutorial
+
+```