2021 EXPANSION 9.0

• Minimum distance between cities increased to 3 squares (fewer but more prosperous cities, faster game, more realistic warfare)
• Defensive combat bonuses of Towns, Cities and Metros increased to 40%, 80% and 120% respectively. Palace bonus increased to 60%
• Coastal Fortress increases city defense by 20%, in addition to its other effects
• Mega map size increased to 230x230 (was 220x220)
• Significant changes to Communism and Feudalism. Communism will be chosen by the AI more often
• Anarchy duration reduced to 2-8 turns (was 2-9 turns)
• New great wonders: Scotland Yard, Ford Car Factory, Climate Treaty
• New graphics for the Secret Police HQ and Broadcast Tower
• Broadcast Tower increases happiness instead of reducing corruption
• The Military Academy auto-builds a General every 40 turns (was 50)
• All units on the map may retreat from a losing battle. In addition to fast units like cavalry, it also applies to infantry, and ships
• New unit: Attack Helicopter
• Range of all missiles and aircraft (except helicopters) increased by 2-3 squares
• Airdrop range of Paratroopers and Modern Paratroopers increased
• All fighter type aircraft increased their combat strength by 2-4, and improved their ground attack capability significantly (rate of fire increased to 2)
• All bomber type aircraft increased their defense by 1-3
• Strategic Bomber and Stealth Bomber were given 1 extra bomb each (rate of fire increased to 5)
• Cost of all aircraft increased accordingly, by up to 50%
• FlaK and Mobile SAM increased their anti-air by 33%. FlaK was given defensive bombard ability
• Rocket Artillery was given 1 extra shot (rate of fire 3)
• Missile Cruiser increased its bombard range (4), rate of fire (3), and anti-air (12)
• Submarine (16.6.4) and Nuclear Submarine (30.10.6) are stronger
• Enkidu Warrior (2.1.1) replaces Warrior, Impi (2.2.1) replaces Spearman, Jaguar Warrior (3.2.1) replaces Swordsman
• Javelin Throwers may enslave defeated enemies
• Cost of Catapult lowered to 20, Trebuchet to 35
• New menu buttons (Main Menu, Civilopedia and Advisors)
• Civilopedia navigation made more intuitive. Active arrows and buttons are blue, inactive ones blend with the background
• Rewritten Civilopedia pages for Buildings and Wonders in the same concise style as previously done for Units, Civilizations and Governments
• Added more info on Civilization and Government pages
• National borders have new and improved graphics
• Enhanced city graphics; the original graphics made clearer and more colorful
• Global warming thermometer added to the info box, to make the current temperature level clearer
• Several changes to the tech tree in the industrial and modern era
• Cost of techs in the industrial and modern era rebalanced, so there is more of a progression, and the transition between eras is smoother
• The AI's movement phase has been optimized to run 12-13% faster
• The AI will use only 1 escort for each artillery unit, freeing up troops for other tasks
• The AI will use maximum 2 escorts for naval transports, freeing up warships for naval supremacy
• Barbarians won't be passive anymore, they will move around and actively seek targets
• C3X mod Release 16 integrated

• More destructive and realistic land and sea bombardment: Same as air bombing, 1/3 chance of targeting either units, population or buildings in a city
• Bombard defense of City Walls, Coastal Fortress, city improvements and population increased by 50%
• Price of Coastal Fortress increased to 60 shields, since it is harder to destroy and more important now (Coastal Fortress absorbs all ship bombardment until destroyed, City Walls do the same against artillery fire)
• SAM City Defense and fighter planes' chance to intercept aircraft reduced by half. SAM City Defense air attack inreased to compensate
• Team Color Discs redrawn. Medium thickness, smoother
• Chopping a forest or jungle yields 15 shields (was 10)
• Russian Cossacks made slightly stronger (9.5.2)
• Welcome screen and several Civilopedia articles cleaned up
• C3X mod Release 15 integrated

• Includes everything in version 8.0 plus two minor bug fixes

• Ancient Cavalry is now a normal unit, available for everyone to build
• The Statue of Zeus wonder auto-builds the new Spartan unit instead
• Guerrillas have been moved to the modern era, with similar but stronger stats (13.9.1)
• The old World-War-era Guerrilla unit has been renamed "Partisan" and given new graphics. The stats are still the same (9.6.1). Partisans upgrade to Guerrillas. Both are cheap, strong attackers, and require no resources
• Transport and Hovercraft capacity increased to 8 units
• Rocket Artillery has increased bombard range (3) and bombard strength (20), but lower fire rate (2)
• Paratrooper (now 10.9.1) and Modern Paratrooper (now 14.13.1) had their attack increased by 1. Fixed issue with vanilla Paratroopers having no combat sounds assigned
• Civilopedia: All great wonder pages have a link to the full list of wonders and their traits, making it easier to plan for a Golden Age
• Viking city names replaced with more historically accurate ones
• The vanilla AI rarely builds City Walls or SAM City Defenses. The probability has been increased, and now they will be built a lot more often
• AI to AI trading activity reduced. More noticeable on higher difficulty levels
• Assimilation rate reduced, and resistance is quelled slower. So it takes a little longer to subjugate newly captured cities
• Sorted civilizations alphabetically in the Player Setup screen (when starting a new game)
• Sorted units more logically and well organized. Affects the order of units listed in the Military Advisor screen (F3), and the Build menu in cities
• Sorted the order of city improvements and wonders better. Affects the Build menu and list of completed improvements in cities
• Fixed a bug where the Iroquois could not build Horsemen
• Fixed a bug where Princesses could be captured by their own civilization
• C3X mod Release 14 integrated

• Visual upgrade for the tech tree: Tech boxes given colored frames. New navigation arrows (see screenshot)
• Marines, Paratroopers and their modern equivalents no longer require Rubber. So even if you lack Rubber, you're not cut off from all offensive units in the modern era
• The Automobile tech has been moved, replacing Mass Production. Combustion renamed Combustion Engine
• Chinese (now dark orange) and Ottomans (blue green) swapped colors, as it is more historically appropriate for both (uniform colors etc.)
• Latest version of the C3X mod (Release 11) integrated

• City Screen & Domestic Advisor (F1): Colored bars show nationalities of citizens, emojis show happiness, white icons show specialist professions (see screenshot)
• National borders redrawn: Thicker, sharper, clearer
• Espionage: Planting a spy is more expensive, but many spy missions are significantly cheaper. Propaganda has a slightly higher chance of success
• Democracies are no longer immune to propaganda, they just have the highest resistance against it
• Rewritten tables for Resistance, Propaganda Modifier, and Culture Ratio
• Technologies have a 20% increased value in trade and negotiations
• Regicide / Mass Regicide games: None of the Kings had combat animations or sounds in the vanilla game, they just stood still when fighting. Fixed. Kings were given +3 Hit Points
• Defensive bonus of Fortress increased to 60%, Barricades to 120%
• Vikings (now Seafaring & Expansionist) swapped traits with the Spanish (Militaristic & Seafaring)

• New unit: Satellite, available with the Satellites tech. ICBM moved to Superconductor
  
• Universal Suffrage has stronger effect and is cheaper to build
• Iron Working requires Masonry in addition to Bronze Working, so it is a little harder to achieve early
  
• Every Civilization page in the Civilopedia has added a link to the history of that civilization
• Saltpeter is white, not grey. Gems colored pink instead of white
• Railroads are darker and look more like railroads
• Marsh terrain and irrigations darkened to fit the new graphics scheme better
• Red shortcut icon for the expansion included

• New terrain graphics that are more detailed and realistic
• Thicker national borders, so the color is easier to see
• Team color discs redrawn, so they are thicker and look more 3D
• Scientific research cost on Mega maps reduced
• Optimal City Numbers (OCN) fine tuned
• Bug fix for a conflict with the C3X mod (pressing the 'L' key to load units inside a town)
• Newest release of C3X mod (release 10B) integrated

• Red "End Turn" button that is easier to see
• The "Combustion" technology is renamed "Automobile". It makes Rubber available on the map
• Newest version of the C3X mod (release 10) integrated
• Several minor improvements

• New unit cursor: Fire Ring cursor
  
• Spanish Conquistador model swapped for a more military style than the vanilla scout unit
• The "Landing Operations" technology (Marines & Paratroopers) is now a little easier to achieve
• Bug fix: Ottoman Sipahi were unable to upgrade to Cavalry, this has been fixed

• Bombard range of all WW2/modern artillery & warships increased to 2 (Missile Cruiser 3)
• Carrier capacity increased to 4, and Supercarrier to 6. Cost reduced to 320 and 500 shields respectively
• 7 Unique Units adjusted: Ottoman Sipahi replaces Cuirassier, not Cavalry. F-15 land bombardment made lethal
  
• Fascism suffers no loss of population upon switching
• Vanilla AI almost never builds Granaries, giving it a disadvantage. Fixed, but needs C3X to work (optional install)
  
• At the standard C3X setting, the AI produces 1/6 of its land forces as artillery. This has been reduced to 1/8
• Cruiser strength (and cost) reduced a little bit. Fighter bombard strength increased to 12
  
• Improved Civilopedia and welcome screen

• AI players now follow 1 of 3 different research strategies (Warrior, Balanced, Builder) rather than all the same one
• Game time lengthened to 600 turns (4000 BC to 2100 AD)
• Mega map size reduced to 220 x 220 tiles to shorten playing time (still 31 civs)
• New unit: Atomic Bomb, auto-built by the Manhattan Project
• New small wonder: Broadcast Tower
• New graphics: Carrier & Self-Propelled Artillery updated
• Some governments (Democracy, Fascism, Republic, Feudalism) adjusted to encourage the AI to make better late game choices
• Simplification: All 10 Spaceship components now cost the same (800 shields each)
  
• Some minor changes to the tech tree in the World Wars era
• Newest release (8) of the C3X mod integrated with the installation (optional to install)

• Several minor improvements to the Civilopedia
• Traits assigned to some Great Wonders
  
• The Manhattan Project auto-buils ICBMs

• C3X mod integrated with the expansion, providing many new features and bug fixes. Enabling the C3X mod is optional
• The Manhattan Project auto-builds nukes
• New graphics: Dark ridge between Sea and Ocean makes navigation easier

• Changes to the movement system for land units, because it caused a glitch in AI behavior and a bug with the General unit

• 12 Unique Units were given more interesting and varied stats
• Fixed some issues with Wonders: A few had their cost adjusted, 3 expire on a different tech, and 2 had their effect adjusted
  
• Manual and Civilopedia updated

• Minimal changes to stats of TOW Infantry, Motorized Infantry, Mechanized Infantry and Modern Paratrooper
• New installation folder with clearer instructions

• Fixed a small error affecting Workers (taking a little too long to finish projects on Mountains)