diff --git a/README.md b/README.md
index b1fac48..9a0013f 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,8 @@ Blob Wars : Attrition is a 2D mission and objective-based platform game. It is t
 
 The develop branch on GitHub (https://github.com/stephenjsweeney/blobWarsAttrition/tree/develop) is where all the dev work happens. Stable(ish) releases will go in to master (https://github.com/stephenjsweeney/blobWarsAttrition/tree/master).
 
+The source code of this game (everything under the src directory) is licensed under the GPL. www.gnu.org/licenses/gpl-3.0.en.html
+
 ### IMPORTANT
 
 This repo does not contain any data files (maps, sprite definitions, etc). In order to play the game, you will need to purchase the data. You can do so here:
@@ -14,6 +16,279 @@ http://www.stephenjsweeney.com/games/attrition/#purchase
 
 The data folder should be placed alongside the gfx, sound, and music folders, so that the game can access it. By default, the "make install" step will place the data files into /opt/blobWarsAttrition. This is where you should copy the data folder, in order for the game to work. Or, after building, you can run the game in place.
 
+### DEMO DATA
+
+Demo data files are also available and can be installed in the same way. The demo data is limited to three maps and does not define all of the game's content. Note that if you test the game with this demo data and then upgrade to the full experience, you should remove both the demo data folder and also the save games that it creates. Otherwise, due to the persistent nature of the game, you may encounter game breaking bugs.
+
+You can download the demo data here, as either a zip or a gzip:
+
+http://www.stephenjsweeney.com/downloads/blobWarsAttrition/blobWarsAttrition-demo-data.zip
+
+http://www.stephenjsweeney.com/downloads/blobWarsAttrition/blobWarsAttrition-demo-data.tar.gz
+
 ## SCREENSHOTS
 
 Screenshots from various versions can be found here: https://github.com/stephenjsweeney/blobWarsAttrition/tree/master/dev/screenshots
+
+## CREDITS
+
+### GRAPHICS
+
+All graphics are CC BY-NC-SA 3.0, with the following attribution: Copyright 2014-2018, Parallel Realities
+
+### GRAPHICS
+
+### SOUND
+
+* 10 Gauge Shotgun
+Copyright Soundbible.com
+www.soundbible.com
+
+* Hydraulic...Thing (12906)
+Copyright 2005, Swelk
+Licensed under Creative Commons
+www.freesound.org
+
+* Cardlock Open (39028)
+Copyright 2007, Wildweasel
+Licensed under Creative Commons
+www.freesound.org
+
+* Back Menu (50557)
+Copyright 2008, Broumbroum
+Licensed under Creative Commons
+www.freesound.org
+
+* Select Menu (50561)
+Copyright 2008, Broumbroum
+Licensed under Creative Commons
+www.freesound.org
+
+* Medium Slash 8 (50790)
+Copyright 2008, Smcameron
+Licensed under Creative Commons
+www.freesound.org
+
+* Missile Launch 2 (51468)
+Copyright 2008, Smcameron
+Licensed under Creative Commons
+www.freesound.org
+
+* Water Gulp (56271)
+Copyright 2008, Q.K.
+Licensed under Creative Commons
+www.freesound.org
+
+* Swosh 22 (60009)
+Copyright 2008, Qubodup
+Licensed under Creative Commons
+www.freesound.org
+
+* Submachinegun2 (67020)
+Copyright 2009, Ls
+Licensed under Creative Commons
+www.freesound.org
+
+* Blood Hitting Window (81042)
+Copyright 2009, Rock Savage
+Licensed under Creative Commons
+www.freesound.org
+
+* Item Respawn (83301)
+Copyright 2009, Silencer1337
+Licensed under Creative Commons
+www.freesound.org
+
+* Gbc Reload 06 (88275)
+Copyright 2010, S_dij
+Licensed under Creative Commons
+www.freesound.org
+
+* 60.wav (93017)
+Copyright 2010, Cosmicd
+Licensed under Creative Commons
+www.freesound.org
+
+* Punch.wav (104183)
+Copyright 2010, Ekokubza123
+Licensed under Creative Commons
+www.freesound.org
+
+* Water_splash.wav (110393)
+Copyright 2010, Soundscalpel.com
+Licensed under Creative Commons
+www.freesound.org
+
+* Gewonnen.mp3 (113989)
+Copyright 2011, Kastenfrosch
+Licensed under Creative Commons
+www.freesound.org
+
+* Transporter Beam.Flac (116505)
+Copyright 2011, Owdeo
+Licensed under Creative Commons
+www.freesound.org
+
+* Tink3d.wav (126531)
+Copyright 2011, Sinkhole7
+Licensed under Creative Commons
+www.freesound.org
+
+* Error.wav (142608)
+Copyright 2012, Autistic Lucario
+Licensed under Creative Commons
+www.freesound.org
+
+* Ricochet.mp3 (148840)
+Copyright 2012, Cedarstudios
+Licensed under Creative Commons
+www.freesound.org
+
+* Gulp (2) (151233)
+Copyright 2012, Owlstorm
+Licensed under Creative Commons
+www.freesound.org
+
+* Door-Handle-Jiggle-04.wav (151578)
+Copyright 2012, D W
+Licensed under Creative Commons
+www.freesound.org
+
+* 8bit Robot Sound (153445)
+Copyright 2012, Lukechalaudio
+Licensed under Creative Commons
+www.freesound.org
+
+* 8bit Robot Sound 2 (153446)
+Copyright 2012, Lukechalaudio
+Licensed under Creative Commons
+www.freesound.org
+
+* Gotitem.mp3 (162467)
+Copyright 2012, Kastenfrosch
+Licensed under Creative Commons
+www.freesound.org
+
+* Metal Clang.aif (170959)
+Copyright 2012, Timgormly
+Licensed under Creative Commons
+www.freesound.org
+
+* S_teleport_05.wav (178350)
+Copyright 2013, Andromadax24
+Licensed under Creative Commons
+www.freesound.org
+
+* Sad Cry 5 (180310)
+Copyright 2013, Jorickhoofd
+Licensed under Creative Commons
+www.freesound.org
+
+* 120110_15 Hot Plate (181490)
+Copyright 2013, Toiletrolltube
+Licensed under Creative Commons
+www.freesound.org
+
+* Scream 01 (219858)
+Copyright 2014, Adriancalzon
+Licensed under Creative Commons
+www.freesound.org
+
+* Screaming_male_painii.mp3 (220289)
+Copyright 2014, Gabrielaupf
+Licensed under Creative Commons
+www.freesound.org
+
+* Bomb
+Copyright 2014, Partners In Rhyme Inc
+www.freesoundeffects.com
+
+* Gun 44 Magnum
+Copyright 2014, Partners In Rhyme Inc
+www.freesoundeffects.com
+
+* Laser Cannon
+Copyright Mike Koenig
+Licensed under Creative Commons
+soundbible.com
+
+* Mortice_key_drop_on_concrete_floor
+Copyright www.freesfx.co.uk
+www.freesfx.co.uk
+
+* Ray Gun
+Copyright Mike Koenig
+Licensed under Creative Commons
+soundbible.com
+
+* Shotgun
+Copyright Soundbible.com
+Licensed under Creative Commons
+soundbible.com
+
+* Pop.wav (83237)
+Copyright 2009, mlestn1
+Licensed under Creative Commons
+www.freesound.org
+
+* welder1.ogg (46501)
+Copyright 2008, PhreaKsAccount
+Licensed under Creative Commons
+www.freesound.org
+
+* Ratchet.wav (319996)
+Copyright 2015, KenRT
+Licensed under Creative Commons
+www.freesound.org
+
+* TF_Power-Tools.flac
+Copyright 2014, copyc4t
+Licensed under Creative Commons
+www.freesound.org
+
+### MUSIC
+
+* Watching
+Copyright Dj Sjors
+Licensed under Creative Commons
+
+* News Background
+Copyright Mansardian
+freesound.org/people/mansardian/sounds/61321
+Licensed under Creative Commons
+
+* The Assasins
+Copyright Audionautix.com
+Licensed under Creative Commons
+
+* Delusion32
+Copyright Audionautix.com
+Licensed under Creative Commons
+
+* Down The Way
+Copyright Audionautix.com
+Licensed under Creative Commons
+
+* Boom
+Copyright Audionautix.com
+Licensed under Creative Commons
+
+* Ectoplasm
+Copyright Audionautix.com
+Licensed under Creative Commons
+
+* So Dramatic
+Copyright Audionautix.com
+Licensed under Creative Commons
+
+* Eternal Whispers
+Copyright Snabisch
+Licensed under Creative Commons
+
+### FONTS
+
+data/fonts/Roboto-Medium.ttf, by Christian Robertson. Licensed under the Apache License, version 2.0
+
+## ABOUT
+
+Blob Wars is copyright Parallel Realities, 2002-2018, All Rights Reserved.