D.'s Sandbox is based of the main game for the Minetest game engine [minetest_game]
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D.'s Sandbox is Copyright (c) 2015 Michael Tomaino PlatinumArts@gmail.com
http://SandboxGameMaker.com
D.'s Sandbox is licensed GPL with the exception of D. The Atom Shifter and his concept.  You are allowed to use D. and his concept for non commercial games and stories though they must be labeled as fan derived and not official.  D. The Atom Shifter, his concept, and all of his story CANNOT be used commercially without expressed written permission from Michael Tomaino of Platinum Arts LLC.  D. The Atom Shifter and all associated content is property of Michael Tomaino of Platinum Arts LLC.  

License of Minetest source code
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Copyright (C) 2010-2012 celeron55, Perttu Ahola <celeron55@gmail.com>
See README.txt in each mod directory for information about other authors.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

License of media (textures and sounds)
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Copyright (C) 2010-2012 celeron55, Perttu Ahola <celeron55@gmail.com>
See README.txt in each mod directory for information about other authors.

Attribution-ShareAlike 3.0 Unported (CC BY-SA 3.0)
http://creativecommons.org/licenses/by-sa/3.0/

License of menu/header.png
Copyright (C) 2013 BlockMen CC BY-3.0
