Creative Commons / Public Domain artwork used with permission.
Many thanks to the authors for sharing!

http://denmanrooke.com/creativecommons/
http://justinckim.deviantart.com/art/RPG-Character-Concept-312406998
http://syntetyc.deviantart.com/art/Waterfall-forest-214723814
http://syntetyc.deviantart.com/art/Green-Forest-206321928
http://syntetyc.deviantart.com/art/Sanctuary-Forest-207795795
http://syntetyc.deviantart.com/art/Deep-Forest-204641620
http://commons.wikimedia.org/wiki/File:Oscar-Zero_Missile_Alert_Facility_launch_control.jpg#filelinks

Special thanks to Jason Farrell for sound effects and music in The Hunter example game