외계인 자원(롱 워 리밸런스)
Aliens accrue resources as the campaign progresses and spend these resources to repair and replace UFOs that XCOM shoots down. Alien resources indirectly affect what kinds of UFOs the aliens deploy on Missions, what types of missions they run each month, and how much Meld you get per canister. Alien resources do not effect the composition of aliens on any mission (this role is performed by Alien Level), but they can influence the quantity of aliens that appear.
Alien resources are capped to at most 100%, and are reset back to at least 0% at the beginning of the month, though they can sit in the negative between months if XCOM is judicious in shooting down numerous alien craft.
Effects of Alien Resources
Increased Aliens on Missions
If current alien resources exceed 40/60/80%, an extra +1/2/3 aliens are added to the following missions:
Abductions, Terror Missions, Landed UFOs, and Crashed UFOs (except for the Overseer).
Alien Resources helps determine the rewards obtained from meld canisters.
Meld Reward = 0.3 * Alien Resources (Min: 33%) * (1 + Alien Level/6) * Difficulty Modifier[1, 1.3, 1.6, 2.0]
The amount of meld per canister is set to a minimum of 10 and is affected by Dynamic War.
At the end of a month, Alien Resource Level is computed and used in conjunction with Aggression to generate the UFO Missions that will be conducted.
Different types of alien missions will be generated based on the following Resource thresholds:
Tight Resources: <17% Modest Resources: 17-33% Adequate Resources: 34-50% Ample Resources: 51-66% Surplus of Resources: >66%
Increasing and Decreasing Alien Resources
Aliens gain resources in a variety of different ways. At the beginning of a month, they are set to a minimum level of 3% for each month that has passed. In addition, each Alien Base they have online generates +6% resources at the end of each month. Lastly, the Aliens can conduct Harvest missions with UFOs to award themselves large chunks of resources.
Aliens only lose resources in two ways: first, paying the initial cost to construct Alien Bases costs them resources. Second, aliens accrue resource costs to replace or repair UFOs that XCOM shoots down, assaults, or damages.
Minimum Monthly Resources
At the beginning of a month, the aliens resource count are set to at least a base minimum. If their current resources exceeds this minimum amount, they do not gain any additional resources.
- Minimum Resources per month: 3% per month (up to a maximum of 100%)
This resource adjustment will affect the missions for the coming month.
Since the maximum amount of resources for aliens is 100%, a campaign that progresses for long enough will eventually see Alien Resources permanently set to its 100% cap at the beginning of each month, regardless of XCOM activity.
Income from Bases
At the end of a month, aliens generate resources for each base they have in play and pay for each base they created.
- Existing alien bases: +6% per base
- Creation of a new alien bases: -20% per base
The UFOs can conduct Harvest missions in an attempt to obtain resources. This is particularly likely if resources from last month were low. Successful Harvests award them with a bunch of resources, depending on the class of UFO used.
- Transport: +12% resources
- Harvester: +9% resources
- Raider: 6% resources
- Scout: 3% resources
Undamaged interceptors can be sent on Combat Patrols. This will cost 550 credits, but will lower continent panic, alien research, and alien resources. Performing a Combat Patrol will raise Alien Aggression by 30%. The aircraft sent on combat patrol will return immediately and will have received 10-90% of it's max health in damage. This is the first way that XCOM can reduce and control alien resource levels.
The amount of effect of the Combat Patrol on all factors (continent panic, alien research, alien resources) is based on the following:
Aircraft: Interceptor: 3-5 Firestorm: 6-8
Weapon: Avalanche Missiles: +0 Stingray Missiles: +0 Phoenix Coilgun: +1 Laser Cannon: +1 EMP Cannon: +2 Plasma Cannon: +3 Fusion Cannon: +4
Cost of Repairing / Replacing UFOs
As a month progresses, shooting down, damaging, or assaulting UFOs accrues costs to replace and repair them, reducing alien resources. This is the other way to actively reduce alien resources, as the Aliens will always be fielding UFOs.
The resource costs to replace shot down, assaulted, or destroyed UFOs is as follows:
- Scout: -2% resources
- Fighter: -2% resources
- Raider: -3% resources
- Destroyer: -4% resources
- Overseer: -7% resources
- Transport: -8% resources
- Abductor: -5% resources
- Harvester: -4% resources
- Terror Ship: -7% resources
- Assault Carrier: -9% resources
- Battleship: -11% resources
Damaged UFOs cost a fraction of their full resource value to replace, proportional to the percentage of damage accrued:
UFO Repair Cost: Regular Resource Cost of UFO x % of Damage Dealt to UFO