Civilization

1. Icons
   • Flags come from Open Clip Art Library are licensed by the Creative Commons Zero 1.0.
   • The app icon 'BC4000' is licensed from Chang Design Lab.
   • Spaceship icons made by Alexandre Beraud are licensed by the GNU General Public License.
   • City icons made by CaptainTVK, Erwan, Smiley, Hogne Håskjold are licensed by the GNU General Public License.
   • Road icons made by Tatu Rissanen, David Pfitzner are licensed by the GNU General Public License.
   • Terrain icons made by Tatu Rissanen, Jeff Mallatt, Eleazar, Vincent Croisier, Michael Johnson, The Square Cow, GriffonSpade are licensed by the GNU General Public License.
   • Unit icons made by Xin Yu are licensed by the GNU General Public License.
2. Sounds
   • Sounds made by Microscopia , Trinity101 , zerolagtime , Robinhood76 , Erdie , 3bagbrew , sagetyrtle , juskiddink , amcavoy719 , acclivity , audiblepie.com , PhreaKsAccount , Leady , miregrobar , Benboncan , dobroide , alienbomb , pauliep83 , Matt_G , Mr Sensible , man , ggctuk , smcameron , qubodup , mattew , belloq , genghis attenborough , steveygos93 , JillianCallahan , jobro , HerbertBoland , nthompson , inferno , Corsica_S , laurent , Walter_Odington , narfnarfsillywilly , hello_flowers , rockdoctor , daveincamas , adcbicycle , Grotelue , Sonic , freesound , rocky_p , Marec , dogripper , Bliss , sculptor , Anton , victorcenusa , weebrian , beckmen , Jace , oliver eye , Horn , Falsalama , Rock Savage , FreqMan , are licensed by the Creative Commons Public License.
   • Sounds made by Warzone - Eidos Entertainment, Eskapada are licensed by the GNU General Public License.
3. Music made by Clint Bellanger, BossLevelVGM, Tad and Hitctrl, Angus Macnaughton, bart, ryanyunck, Yubatake, Tri-Tachyon, axtoncrolley, Otto Halmén, Hitctrl Aaron Spencer [AS] Bryan Boyko [BB] Chech National Symphony Orchestra [CNSO] Damiano Baldoni [DB1] Dimension Bucket [DB2] Doug Kaufman [DK] Guifrog HalcyonicFalconX [HFX] Johannes Shroll [JS] John Philip Sousa [JPS] Kai Engel [KE] krackatoa Michael Kiefernagel [MK] Martin Severn [MS] Mattias Westlund [MW] Omri Lahav [OL] Per Kiilstofte [PK] Ross Bugden [RB] Tagirijus Tyler Johnson [TJ] stratkat [SK] are licensed by the Creative Commons BY 3.0 or 4.0
4. Maps
   • Africa Continent map made by Ferdinand Steinkrüge is licensed by the GNU General Public License.
   • Asia Continent map made by Mercator is licensed by the GNU General Public License.
   • Europe Continent map made by Rob Best is licensed by the GNU General Public License.
   • North America Continent map made by Robert Michael Best is licensed by the GNU General Public License.
   • South America Continent map made by Ferdi is licensed by the GNU General Public License.
   • British map made by Martin McMahon, Daniel Markstedt and Mateusz Stefek is licensed by the GNU General Public License.
   • France map made by Mathieu Roy is licensed by the GNU General Public License.
   • Iberian map made by Miguel Farah, Daniel Markstedt is licensed by the GNU General Public License.
   • Italy map made by Paolo Sammicheli is licensed by the GNU General Public License.
   • Japan map made by Robert Michael Best is licensed by the GNU General Public License.
   • New Zealand map made by Bevan Findlay is licensed by the GNU General Public License.
   • The world map made by Helge Arne Gudmestad, Daniel Markstedt is licensed by the GNU General Public License.
5. Rulesets
   • Classic, Civ2Civ3, Multiplayer and Alien rulesets made by Freeciv are licensed by the GNU General Public License.
   • Augmented ruleset made by Wahazar is licensed by the GNU General Public License.
   • Aviation ruleset made by Ec429 is licensed by the GNU General Public License.
6. The game concept is inspired by Sid Meier's Civilization II from MicroProse.
7. Data structure design and simualtion algorithm are inspired by Freeciv, created by Peter Unold, Claus Leth Gregersen and Allan Ove Kjeldbjerg.