UFO Incursions (Apocalypse)

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This page lists the types of UFO incursions, the craft involved on each alien mission and their specific roles.

Each incursion fleet will consist of 1-7 craft, each with a specific composition and role than can be consulted on the tables below. Each force will consist of UFOs with a primary mission which can be Infiltration, Subversion, Attack and Overspawn Drop. Usually there will also be additional craft flying as escorts and in a few cases an Infiltration or Overspawn Drop force will also have craft assigned to Attack hostile buildings.

The composition of the fleets depends on the UFOs available at the Alien Dimension. Thus, certain fleets will only appear after a certain date. The fleets are sorted in order of priority; for a given mission, the aliens will always use the highest-numbered fleet (furthest down on the list) that they can.

The game seems to choose the mission randomly from a list of 10 missions that at game start will consist of only Infiltration ones. As the weeks go this list is changed and other missions are added to that list, although the probability of them occuring will initially be 1 in 10.

Infiltration Fleets

Mission Primary Escort Attack Week
1Apoc ufo2 icon.pngApoc ufo2 icon.pngApoc ufo1 icon.png1
2Apoc ufo2 icon.pngApoc ufo2 icon.pngApoc ufo2 icon.pngApoc ufo1 icon.pngApoc ufo1 icon.png1
3Apoc ufo3 icon.pngApoc ufo2 icon.pngApoc ufo2 icon.png2
4Apoc ufo3 icon.pngApoc ufo4 icon.pngApoc ufo4 icon.png2
5Apoc ufo3 icon.pngApoc ufo3 icon.pngApoc ufo4 icon.pngApoc ufo4 icon.png2
6Apoc ufo3 icon.pngApoc ufo5 icon.pngApoc ufo4 icon.pngApoc ufo4 icon.png4
7Apoc ufo6 icon.pngApoc ufo2 icon.pngApoc ufo2 icon.png3
8*Apoc ufo6 icon.pngApoc ufo5 icon.pngApoc ufo5 icon.png4
9Apoc ufo6 icon.pngApoc ufo3 icon.pngApoc ufo2 icon.pngApoc ufo2 icon.pngApoc ufo2 icon.png3
10Apoc ufo6 icon.pngApoc ufo6 icon.pngApoc ufo4 icon.pngApoc ufo4 icon.pngApoc ufo4 icon.png3
11Apoc ufo6 icon.pngApoc ufo5 icon.pngApoc ufo5 icon.png4
12Apoc ufo6 icon.pngApoc ufo6 icon.pngApoc ufo5 icon.pngApoc ufo4 icon.pngApoc ufo4 icon.pngApoc ufo4 icon.png4
13Apoc ufo6 icon.pngApoc ufo6 icon.pngApoc ufo7 icon.pngApoc ufo7 icon.png5
14Apoc ufo6 icon.pngApoc ufo6 icon.pngApoc ufo8 icon.pngApoc ufo8 icon.pngApoc ufo8 icon.png8
15Apoc ufo6 icon.pngApoc ufo6 icon.pngApoc ufo8 icon.pngApoc ufo8 icon.pngApoc ufo8 icon.pngApoc ufo7 icon.pngApoc ufo7 icon.png8
16*Apoc ufo9 icon.pngApoc ufo6 icon.pngApoc ufo6 icon.pngApoc ufo8 icon.pngApoc ufo8 icon.png7
17**Apoc ufo9 icon.pngApoc ufo8 icon.pngApoc ufo9 icon.png7
18Apoc ufo9 icon.pngApoc ufo8 icon.pngApoc ufo8 icon.png7
19Apoc ufo10 icon.png8
20Apoc ufo10 icon.pngApoc ufo9 icon.pngApoc ufo8 icon.pngApoc ufo8 icon.png8

*These fleets will never appear, as the ships required will also fulfil a higher-priority fleet.

**This fleet can appear as long as the aliens have at least one Battleship and one Escort Ship (though two Battleships will still appear in Mega-Primus). This is the result of a bug in the spawn routine; instead of checking whether there are two Battleships, it checks whether there is one Battleship twice.

Subversion Fleets

Mission Primary Escort Week
1Apoc ufo1 icon.pngApoc ufo1 icon.pngApoc ufo1 icon.png5
2Apoc ufo2 icon.pngApoc ufo2 icon.pngApoc ufo2 icon.pngApoc ufo2 icon.png5
3Apoc ufo2 icon.pngApoc ufo2 icon.pngApoc ufo2 icon.pngApoc ufo1 icon.pngApoc ufo1 icon.pngApoc ufo1 icon.png 5
4Apoc ufo4 icon.pngApoc ufo4 icon.pngApoc ufo2 icon.pngApoc ufo2 icon.pngApoc ufo2 icon.png5
5Apoc ufo5 icon.pngApoc ufo5 icon.pngApoc ufo4 icon.pngApoc ufo4 icon.png5
6Apoc ufo5 icon.pngApoc ufo5 icon.pngApoc ufo4 icon.pngApoc ufo4 icon.pngApoc ufo2 icon.pngApoc ufo2 icon.pngApoc ufo2 icon.png5
7Apoc ufo5 icon.pngApoc ufo5 icon.pngApoc ufo5 icon.pngApoc ufo6 icon.png5
8Apoc ufo7 icon.pngApoc ufo7 icon.pngApoc ufo5 icon.pngApoc ufo5 icon.png5
9Apoc ufo9 icon.pngApoc ufo8 icon.png7
10Apoc ufo10 icon.pngApoc ufo8 icon.png8

  • Subversion fleets can appear from Week 5 onwards.

Attack Fleets

Mission Primary Escort Week
1Apoc ufo4 icon.pngApoc ufo4 icon.png4
2Apoc ufo4 icon.pngApoc ufo4 icon.pngApoc ufo4 icon.pngApoc ufo2 icon.pngApoc ufo2 icon.png4
3Apoc ufo5 icon.pngApoc ufo5 icon.pngApoc ufo5 icon.png5
4Apoc ufo5 icon.pngApoc ufo5 icon.pngApoc ufo4 icon.pngApoc ufo4 icon.png4
5Apoc ufo7 icon.pngApoc ufo7 icon.pngApoc ufo4 icon.pngApoc ufo4 icon.pngApoc ufo4 icon.png5
6Apoc ufo7 icon.pngApoc ufo7 icon.pngApoc ufo7 icon.pngApoc ufo5 icon.pngApoc ufo5 icon.png6
7Apoc ufo7 icon.pngApoc ufo7 icon.pngApoc ufo8 icon.pngApoc ufo8 icon.png7
8Apoc ufo9 icon.pngApoc ufo9 icon.pngApoc ufo7 icon.pngApoc ufo7 icon.png9
9Apoc ufo10 icon.pngApoc ufo9 icon.pngApoc ufo9 icon.png9
10Apoc ufo10 icon.pngApoc ufo9 icon.pngApoc ufo7 icon.pngApoc ufo7 icon.png8

  • Attack fleets appear from Week 4 onwards.

Overspawn Drop Fleets

Mission Primary Escort Attack Week
1Apoc ufo10 icon.png8
2Apoc ufo10 icon.pngApoc ufo8 icon.pngApoc ufo8 icon.png8
3Apoc ufo10 icon.pngApoc ufo8 icon.pngApoc ufo8 icon.pngApoc ufo8 icon.pngApoc ufo7 icon.pngApoc ufo7 icon.png8
4Apoc ufo10 icon.pngApoc ufo9 icon.png8
5Apoc ufo10 icon.pngApoc ufo10 icon.pngApoc ufo9 icon.pngApoc ufo9 icon.png11

  • Overspawn drops can appear from Week 8 onwards.
  • A fleet with two Motherships is guaranteed to be on an Overspawn Drop mission.

See Also