Civilization

1. The game concept is inspired by Sid Meier's Civilization II from MicroProse.
2. Data structure design and simualtion algorithm are inspired by Freeciv , created by Peter Unold, Claus Leth Gregersen and Allan Ove Kjeldbjerg, maintained by Community .
3. 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.
   • Terrain icons made by Hogne Håskjold, Architetto Francesco [http://www.public-domain-photos.com/], Unknown Battle For Wesnoth artists are licensed by the GNU General Public License.
   • Unit icons made by Xin Yu are licensed by the GNU General Public License.
4. 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.
5. 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
6. 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.
7. Rulesets
   • Classic, Civ2Civ3, Sandbox, 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.