Civilization

1. The game concept is inspired by Sid Meier's Civilization II from MicroProse, and Sid Meier's Civilization V from Firaxis Games.
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 ) and Unciv (Created by Yair Morgenstern, maintained by Community ).
3. The app icon 'BC4000' is licensed from Chang Design Lab.
4. City icons made by CaptainTVK, Erwan, Smiley, Hogne Håskjold are licensed by the GNU General Public License.
5. Second Generation Ruleset Assets
   • Icons
     • Flags come from Open Clip Art Library are licensed by the Creative Commons Zero 1.0.
     • Spaceship icons derived from Alexandre Beraud 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 Creative Commons Attribution-Share Alike License.
     • Unit icons made by Xin Yu are licensed by the Creative Commons Attribution-Share Alike License.
   • 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.
   • 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
   • Maps derived from GM1530 Scenario Package , German States 1871 and Scenarios made for FreeCiv are licensed by the Creative Commons Attribution-Share Alike License.
   • 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.
6. Fifth Generation Ruleset Assets
   • Unit Icons AbsoluteUnits unitset made by letstalkaboutdune are licensed under Creative Commons Attribution 4.0 International.
   • Terrain pictures made by Battle For Wesnoth artists are licensed by the GNU General Public License and the Creative Commons License.
   • Scenario maps made by A1y0sh4, Arccc, Arran, Basilko, Bamboolord, Fanat6666, gosha9898, hamidori for Unciv are downloaded from Discord Channel.