Incursion Strength (LWR)

Back to Main Page

In General

Incursion Strength is a measure of the number of aliens that will be sent to each mission. Higher incursion strengths means more aliens on missions.

Incursion Strength increases as XCOM performs well and decreases if they perform poorly.

Effect of Incursion Strength

The effect of Incursion Strength is directly increasing the number of aliens on all non-scripted missions.

Number of Aliens = Base Number * Incursion Strength

Increasing and Decreasing Incursion Strength

Incursion Strength starts at 100 and can be modified as follows:

Event	Incursion Strength modification
XCOM successfully completes a mission	+2 (modified by campaign length)
A UFO is destroyed in the air	+1 (modified by campaign length)
A successful Alien Base Assault	+20
A soldier dies with a rank greater than the number of months passed	-4 (modified by campaign length)
A soldier dies with a rank greater than SGT (does not stack with previous)	-2 (modified by campaign length)
An XCOM unit dies (does not stack with previous two)	-1 (modified by campaign length)
An aircraft is lost	-2 (modified by campaign length)
A country is lost to the aliens	-10

Every day Incursion Strength (IS) moves towards 100: There is an x% chance to move 1 closer to 100 at the end of each day where x is the absolute value of (Incursion Strength - 100)

• Incursion Strength at or over 120 will be denoted with an additional + sign on landed UFO, terror, and abduction missions

See also

Long War Rebalance: Aliens
Aliens	Alien Life Forms • Alien Missions • UFOs • Alien Artifacts • Alien Level • Alien Resources • Alien Aggression