arena is distributed under the terms of the GNU General Public License, version 3.

You can find the terms of that license in the COPYING file which is included with arena, or at http://www.gnu.org/licenses/.

arena 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.

arena is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABLITY 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 arena. If not, see http://www.gnu.org/licenses/.