Broken Earth

The Broken Earth scenario is one of the two scenarios available in the Dark Skies DLC. It begins in the year 2112, one hundred and fifty years into an alternate timeline where the Cuban Missile Crisis led to a nuclear exchange that destroyed much of human civilization. It includes a number of adjustments to the setup of the game to emphasize the post-apocalyptic nature of the setting, most of which serve to increase the role of terrestrial warfare (especially in the early game).

Major changes include:

• Nations are typically much smaller and more equal in power, with relatively few peaceful Claims but large numbers of hostile claims.
• The multiplier for IP from the size of a nation's economy is significantly more generous, making large nations much more powerful.
• It is much cheaper to build and maintain Armies, especially for home defense.
• No nation begins with Nuclear Weapons or any progress towards unlocking them, and there is a global -95% penalty to the Nuclear Weapons Priority.
• Each faction will receive a powerful Playing From Behind project early in the game, which gives significant faction-specific bonuses and penalties.

Detailed Changes List

Terrestrial Warfare Changes

• Armies cost 40 IP to build, not 60.
• Armies in their home region cost 0.2 IP per month, not 0.5.
• Armies away from home cost an additional 1.0 IP per month, not 0.5.
• Navies cost 100 IP to build, not 80.
• Navies cost 0.4 IP per month, not 0.5.

Nation changes

• The base IP formula for Nations is now 0.62 * GDP (in billions) ^ 0.48, instead of GDP (in billions) ^ 0.35.
• The population scaling on certain priorities is weakened, from (Population/50 million) ^ 0.35 to (Population/50 million)^0.30.
• The cost of improving regions is reduced.
  • Oil Region cost 500 -> 325 Economy Priority completions.
  • Mining Region cost 750 -> 500 Economy Priority completions.
  • Core Economic Region cost 1200 -> 900 Economy Priority completions.
  • Hostile claims legitimization cost 200 -> 100 Government Priority/Unity Priority completions.
• The effect of the Economy Priority on GDPPC and Inequality is increased by 70%.
• All nations begin with penalties to the following priorities: -95% Nuclear Weapons Priority, -50% Mission Control Priority, and -65% Boost Priority.
  • The nuclear weapons penalty can be reduced to -45% by any faction completing the Responsible Nuclear Weapon Systems project.
  • The Boost and MC penalties can be offset by completing the A New Space Race global tech.

Other changes

• All factions begin with -70 Control Point Capacity.
  • This can be offset by the Playing From Behind project.
• All factions begin with -50% Space Science.
  • This can be offset by completing the A New Space Race global tech.

SPOILERS INSIDE!

Alien nuclear hardening is reduced by 35% All factions get +3 defense to the Terrorize Region mission. The income of Alien Base Alpha starts at 15% of its base value, and increses to 100% over a period of time that depends on the difficulty level. 1.5 years for a Cinematic game (or Brutal, if playing as The Servants) 1 year for a Normal game (or Veteran, if playing as The Servants) 0.5 years for a Veteran game (or Normal, if playing as The Servants) 0.01 years for a Brutal game (or Cinematic, if playing as The Servants) The Alien Wormhole Setup Speed value for Veteran difficulty is reduced from 0.75 to 0.50, and for Brutal from 0.5 to 0.01. This will get the alien base producing its incomes more quickly. These difficulties are inverted for The Servants, so the "Veteran" values apply to Normal games, and the "Brutal" values apply to Cinematic games. The Extra Years to Delay Alien Invasion value for Veteran difficulty is reduced from 6 to 4, and for Normal it is reduced from 12 to 9 As above, these difficulties are inverted for The Servants, with "Veteran" applying to Normal games and "Normal" applying to Veteran games. The "Invader Armies Lost Before Buildup" value is reduced from 3 to 0, which means aliens will start increasing their desired assault strength (for sending assault carriers to Earth) after losing their first army.

These values are drawn directly from TIGlobalConfig.json, as of v1.0.53b, and show the effects that are not included in the list above. (TODO: Confirm meanings, translate them into normal human text, and add them to the list above.)

• "occupationSpeed": 1.5,
• "battleDamageEffectivenessFactor": 0.5,
• "localDefensesDamageEffectivenessFactor": 0.3333333333333,
• "ruggedTerrainDefenseBonus": 0.2,
• "coreEconomicRegionDefenseBonus": 0.1,
• "baseRegionDefenseBonus": 0.1,
• "armyRegionDefenseBonus": 0.2,
• "armyCrackdownMalus": 0.2,
• "adjacentFriendlyForcesRegionMiltechMultiplier": 0.1,
• "defenseCohesionMultiplier": 0.05,
• "defenseUnrestMultiplier": -0.05,
• "armyStrengthToLiberate": 0.8,
• "maxValueFromAttackerAdjacentControlPoints": 3,
• "TIMissionModifier_NationalRivalries_Multiplier": 0.666,