diff --git a/README.md b/README.md
index d32217c..b5520d8 100644
--- a/README.md
+++ b/README.md
@@ -7,6 +7,35 @@ This mod puts turn-based-combat of RPGs into Minecraft!
 Precompiled jars are available here:
 https://seodisparate.com/static/tbm_releases/
 
+# Things you may need to know about this mod
+
+On first run, this mod will create a config file and some directories in your
+Minecraft directory. They will typically be located at
+`.minecraft/config/TurnBasedMinecraft`.
+
+The config file `.minecraft/config/TurnBasedMinecraft/TBM_Config.xml` is commented
+with info on what each option does. It will also be moved if a newer version
+of this mod has a newer version of the config file (usually renamed with a
+timestamp).
+
+Some options in the config file only affect the Server, and some only affect the Client.
+When playing multiplayer, some configuration of the config on the server may be needed.
+
+# Features
+
+- Combat between players and mobs or other players will invoke a turn based battle
+between them
+- Supports use of the vanilla Minecraft bow and arrows (have bow selected when
+in battle)
+- Supports custom battle music to be played when fighting enemies. (They must be
+placed in `.minecraft/config/TurnBasedMinecraft/Music/battle` or
+`.minecraft/config/TurnBasedMinecraft/Music/silly`. Client-side config determines
+which song plays in battle for the client.)
+- Config allows limiting number of combatants in turn-based battle.
+- Config can be modified (server-side) to add entries of mobs from other mods.
+(by default an unknown mob cannot enter turn-based battle, so the config must be
+configured for them.)
+
 # Building
 
 Simply invoke `./gradlew build` in the mod directory and after some time the