diff --git a/CREDITS.md b/CREDITS.md
index 624591f0..f5d02ddb 100644
--- a/CREDITS.md
+++ b/CREDITS.md
@@ -1,15 +1,14 @@
-CREDITS for Lazarr!
+# CREDITS for Lazarr!
 
 Lazarr! is a puzzle game by Wuzzy, using some textures, sounds and code from others.
 
-External mods used:
+It is free software, released under the conditions of the GNU GPL version 3, or any later version.
+The media files are free cultural works, released under the CC BY-SA 3.0 license.
 
-* `show_wielded_item`
-* `player_api`, `stairs`, `screwdriver2`
+Details (and an explanation of all the license name abbreviations) follow:
 
----
+## Textures
 
-Textures:
 - Water, wood, tree, stone, tools, hand, gold block, wooden chest, locked wooden chest, ship lightbox, player textures, crates, seaweed, purple coral, crab grass, fire come from “PixelBOX” texture pack by jp (CC0)
 - Textures in `lzr_decor` mod made by jp (CC0)
 - Barricade, dark chest made by jp (CC0)
@@ -30,26 +29,28 @@ Textures:
 	- License: OGA-BY 3.0 <https://static.opengameart.org/OGA-BY-3.0.txt>
 - `xocean_*.png`:
 	- By StarNinjas
-	- License: MIT License
+	- License: MIT
 - `lzr_decor_ocean_pillar.png`:
 	- By StarNinjas
-	- License: MIT License
+	- License: MIT
 	- Original file name `xocean_pillar.png`
 - `lzr_decor_ocean_pillar_top.png`:
 	- By StarNinjas and Wuzzy
 	- Derivate work of `xocean_pillar.png`
-	- License: MIT License
+	- License: MIT
 - `lzr_decor_ocean_stone_block.png`:
 	- By StarNinjas and Wuzzy
 	- Derivate work of `xocean_stone.png`
-	- License: MIT License
+	- License: MIT
+
+## Models
 
-Models:
 - Mirror models made by Wuzzy (CC0)
 - Skull models made by Mikita "rudzik8" Wiśniewski (CC BY-SA 3.0)
 - Player model comes from Minetest Game (see license of Minetest Game 5.4.1 for details)
 
-Sounds:
+## Sounds
+
 - `lzr_ambience_ocean.ogg` comes from <https://freesound.org/people/inchadney/sounds/135805/>
 	- by inchadney (CC BY 3.0)
 - `lzr_ambience_temple.ogg` comes from <https://freesound.org/people/Zixem/sounds/69391/>
@@ -103,7 +104,7 @@ Sounds:
 	- License: CC0
 - `lzr_sounds_footstep_stone.*.ogg`, `default_dirt_footstep.*.ogg`, `lzr_sounds_footstep_leaves.*.ogg`, `lzr_sounds_dug_grass.*.ogg`:
 	- by Wuzzy
-	- License: MIT License
+	- License: MIT
 - `lzr_treasure_chest_open.ogg`:
 	- by JUDITH136 <https://freesound.org/people/JUDITH136/sounds/408001/>
 	- License: CC BY 3.0
@@ -117,22 +118,31 @@ Sounds:
 
 - All other sounds come from Minetest Game (see license of Minetest Game 5.4.1 for details)
 
-Code:
+## Source code
+
 - `give_initial_stuff`, `player_api`, `stairs` come from Minetest Game 5.4.1 (mods modified for Lazarr!), by Minetest Game developers (see README.txt in those folders)
 - `screwdriver2` by 12Me21, modified version (CC0)
 - `lzr_panes` is based on `xpanes` from Minetest Game and massively simplified (MIT License for code, CC BY-SA 3.0 for media)
 - `lzr_decor` is based on `xdecor` by jp (BSD-3 clause license; massively-simplified version from the original)
+- **All other mods that start with "`lzr_`" by Wuzzy (GPLv3+)**
+- `no_fall_damage`, `no_multiplayer`, `show_wielded_item` by Wuzzy (CC0)
+
+## Translations
 
-Translations:
 - German: Wuzzy
 - Chinese (`zh_TW`): Emojigit
 
-Other stuff:
+## Other stuff
+
 - See the licence files of the individual mods
 
-Code for all the mods that begin with "lzr_" (e.g. the mod "`lzr_laser`")
-- done by Wuzzy (GPLv3+)
+## License references
 
-`no_fall_damage`, `no_multiplayer`, `show_wielded_item` mods
-- done by Wuzzy (CC0)
+The abbreviations above are license names. Here is a reference to all of them:
 
+* GPLv3+: The GNU General Public License version 3, or any later version <https://www.gnu.org/licenses/gpl-3.0.en.html>
+* MIT: The MIT License <https://mit-license.org/>
+* CC0: Creative Commons Zero <https://creativecommons.org/publicdomain/zero/1.0/>
+* CC BY 3.0: Creative Commons Attribution 3.0 Unported <https://creativecommons.org/licenses/by/3.0/>
+* CC BY-SA 3.0: Creative Commons Attribution-ShareAlike 3.0 Unported <https://creativecommons.org/licenses/by-sa/3.0/>
+* OGA-BY 3.0: OpenGameArt.org Legal Code Attribution 3.0 Unported <https://static.opengameart.org/OGA-BY-3.0.txt>
diff --git a/README.md b/README.md
index bb289404..e634f131 100644
--- a/README.md
+++ b/README.md
@@ -29,4 +29,24 @@ Lazarr! contains a very crude level editor. It's not great but better than nothi
 See `LEVEL_EDITOR.md` to read how it works.
 
 ## Credits/License
-See CREDITS.md for credits and license.
+
+Lazarr!, a pirate-themed laser puzzle game
+Copyright (C) 2024  Wuzzy
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+The media files are released under a separate free cultural works license:
+Creative Commons Attribution-ShareAlike 3.0 Unported (CC BY-SA 3.0)
+
+See CREDITS.md for credits and details.