Difference between revisions of "UFO Incursions (Apocalypse)"
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{| {{StdCenterTable}} | {| {{StdCenterTable}} | ||
|- {{StdDescTable Heading}} | |- {{StdDescTable Heading}} | ||
− | !Week!!Infiltration!!Base Assault!! | + | !Week!!Infiltration!!Base Assault!!Bombing!!Overspawn Drop |
|- | |- | ||
|1-3||100%||0%||0%||0% | |1-3||100%||0%||0%||0% | ||
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* UFO fleets led by [[Alien Transporter (Apocalypse)|Transporters]] or [[Alien Assault Ship (Apocalypse)|Assault Ships]] are always on Infiltration missions. | * UFO fleets led by [[Alien Transporter (Apocalypse)|Transporters]] or [[Alien Assault Ship (Apocalypse)|Assault Ships]] are always on Infiltration missions. | ||
+ | |||
+ | ==Bombing Fleets== | ||
+ | |||
+ | Likely the second or type of fleet the player will have to contend with (or third depending on luck), 'Bombing' fleets are exactly that - UFOs sent to cause as much destruction to the city, craft and X-Com as possible. These typically consist of primary craft using disruptor bombs or multi-warhead missiles while escorted by Fast Attack or stronger escort ships using medium or larger disruptor beams. On the plus side, players will not have to worry about tactical missions other than to sieze any downed UFOs, as they will not be attempting to deposit troops in buildings. These fleets will remain in the city much longer than infiltration fleets before pulling back to the alien dimension, and can cause massive damage if not left unchecked. While they can be a great source of captured UFOs and technology, a bombing fleet should never be underestimated, as it can pose one of the greatest threats to unprepared X-Com craft. | ||
+ | |||
+ | |||
+ | <table {{StdCenterTable}}> | ||
+ | <tr {{StdDescTable_Heading}}><th align="left">Mission</th> | ||
+ | <th>Primary</th> | ||
+ | <th>Escort</th> | ||
+ | <th>Week</th></tr> | ||
+ | <tr><td align="left">1</td><td>[[Image:Apoc_ufo4_icon.png|link=Alien Fast-Attack Ship (Apocalypse)]][[Image:Apoc_ufo4_icon.png|link=Alien Fast-Attack Ship (Apocalypse)]]</td><td></td><td>4</td></tr> | ||
+ | <tr><td align="left">2</td><td>[[Image:Apoc_ufo4_icon.png|link=Alien Fast-Attack Ship (Apocalypse)]][[Image:Apoc_ufo4_icon.png|link=Alien Fast-Attack Ship (Apocalypse)]][[Image:Apoc_ufo4_icon.png|link=Alien Fast-Attack Ship (Apocalypse)]]</td><td>[[Image:Apoc_ufo2_icon.png|link=Alien Scout Ship (Apocalypse)]][[Image:Apoc_ufo2_icon.png|link=Alien Scout Ship (Apocalypse)]]</td><td>4</td></tr> | ||
+ | <tr><td align="left">3</td><td>[[Image:Apoc_ufo5_icon.png|link=Alien Destroyer (Apocalypse)]][[Image:Apoc_ufo5_icon.png|link=Alien Destroyer (Apocalypse)]][[Image:Apoc_ufo5_icon.png|link=Alien Destroyer (Apocalypse)]]</td><td></td><td>5</td></tr> | ||
+ | <tr><td align="left">4</td><td>[[Image:Apoc_ufo5_icon.png|link=Alien Destroyer (Apocalypse)]][[Image:Apoc_ufo5_icon.png|link=Alien Destroyer (Apocalypse)]]</td><td>[[Image:Apoc_ufo4_icon.png|link=Alien Fast-Attack Ship (Apocalypse)]][[Image:Apoc_ufo4_icon.png|link=Alien Fast-Attack Ship (Apocalypse)]]</td><td>4</td></tr> | ||
+ | <tr><td align="left">5</td><td>[[Image:Apoc_ufo7_icon.png|link=Alien Bomber (Apocalypse)]][[Image:Apoc_ufo7_icon.png|link=Alien Bomber (Apocalypse)]]</td><td>[[Image:Apoc_ufo4_icon.png|link=Alien Fast-Attack Ship (Apocalypse)]][[Image:Apoc_ufo4_icon.png|link=Alien Fast-Attack Ship (Apocalypse)]][[Image:Apoc_ufo4_icon.png|link=Alien Fast-Attack Ship (Apocalypse)]]</td><td>5</td></tr> | ||
+ | <tr><td align="left">6</td><td>[[Image:Apoc_ufo7_icon.png|link=Alien Bomber (Apocalypse)]][[Image:Apoc_ufo7_icon.png|link=Alien Bomber (Apocalypse)]][[Image:Apoc_ufo7_icon.png|link=Alien Bomber (Apocalypse)]][[Image:Apoc_ufo5_icon.png|link=Alien Destroyer (Apocalypse)]][[Image:Apoc_ufo5_icon.png|link=Alien Destroyer (Apocalypse)]]</td><td></td><td>6</td></tr> | ||
+ | <tr><td align="left">7</td><td>[[Image:Apoc_ufo7_icon.png|link=Alien Bomber (Apocalypse)]][[Image:Apoc_ufo7_icon.png|link=Alien Bomber (Apocalypse)]]</td><td>[[Image:Apoc_ufo8_icon.png|link=Alien Escort Ship (Apocalypse)]][[Image:Apoc_ufo8_icon.png|link=Alien Escort Ship (Apocalypse)]]</td><td>7</td></tr> | ||
+ | <tr><td align="left">8</td><td>[[Image:Apoc_ufo9_icon.png|link=Alien Battleship (Apocalypse)]][[Image:Apoc_ufo9_icon.png|link=Alien Battleship (Apocalypse)]][[Image:Apoc_ufo7_icon.png|link=Alien Bomber (Apocalypse)]][[Image:Apoc_ufo7_icon.png|link=Alien Bomber (Apocalypse)]]</td><td></td><td>9</td></tr> | ||
+ | <tr><td align="left">9</td><td>[[Image:Apoc_ufo10_icon.png|link=Alien Mothership (Apocalypse)]][[Image:Apoc_ufo9_icon.png|link=Alien Battleship (Apocalypse)]][[Image:Apoc_ufo9_icon.png|link=Alien Battleship (Apocalypse)]]</td><td></td><td>9</td></tr> | ||
+ | <tr><td align="left">10</td><td>[[Image:Apoc_ufo10_icon.png|link=Alien Mothership (Apocalypse)]][[Image:Apoc_ufo9_icon.png|link=Alien Battleship (Apocalypse)]][[Image:Apoc_ufo7_icon.png|link=Alien Bomber (Apocalypse)]][[Image:Apoc_ufo7_icon.png|link=Alien Bomber (Apocalypse)]]</td><td></td><td>8</td></tr> | ||
+ | </table><br /> | ||
+ | |||
+ | * Bombing fleets appear from Week 4 onwards. | ||
==Base Assault Fleets== | ==Base Assault Fleets== | ||
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</table><br /> | </table><br /> | ||
− | * | + | * Base Assault fleets can appear from Week 5 onwards. |
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==[[Overspawn]] Drop Fleets== | ==[[Overspawn]] Drop Fleets== |
Revision as of 03:15, 25 February 2022
This page lists the various nuts and bolts of how the game decides which Alien Craft come out of the Dimension Gates and what they do once in Mega-Primus.
Unlike in UFO: Enemy Unknown and X-Com: Terror From the Deep, the Aliens in X-COM: Apocalypse do not have infinite reserves of craft. Rather, the pool of craft in the Alien Dimension is tracked, with new UFOs being constructed every Monday (up to a limit) and X-COM interceptions removing craft from the pool.
Every time an alien mission is scheduled, the game rolls randomly on a table to decide what act they will attempt to perform. This table changes every week. Then, once an act has been selected, the specific UFO makeup of the incursion is chosen deterministically from tables for each possible act depending on what craft are available in the Alien Dimension pool; as reproduced here, the tables increase in priority downward, so the aliens will always use the highest-numbered fleet possible for the chosen mission.
Some UFOs on the Infiltration and Overspawn Drop tables are listed as "Bombing" craft. These craft will bomb a building, as though on an Air Raid mission.
Destroying the Control Chamber building permanently halts the production of alien craft. It also triggers a special incursion not found on these tables - the next time an alien mission is scheduled, all remaining UFOs (except Probes) will swarm out of the Dimension Gates and start tearing down Mega-Primus as though on a very large Air Raid mission. This final battle is typically referred to as "the Apocalypse mission".
UFO Production
Week | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
1 | 9 | 9 | ||||||||
2 | 2 | 4 | 3 | 2 | ||||||
3 | 2 | 4 | 2 | 2 | 3 | |||||
4 | 1 | 2 | 1 | 1 | 2 | 2 | ||||
5 | 1 | 1 | 1 | 1 | 2 | |||||
6 | 1 | 1 | 1 | 1 | 1 | |||||
7 | 1 | 1 | 1 | 1 | 1 | |||||
8 | 1 | 1 | 1 | 1 | 1 | |||||
9 | 1 | 1 | ||||||||
10 | 1 | 1 | ||||||||
11 | 1 | 1 | 1 | 1 | ||||||
12 | 1 | 1 | ||||||||
13 | 1 | 1 | 1 | |||||||
14 | 1 | 1 | ||||||||
15 | 1 | |||||||||
16+ | 1 | 1 | 1 | 1 | ||||||
Maximum | 15 | 15 | 6 | 6 | 6 | 6 | 6 | 6 | 4 | 2 |
Mission Chance
Week | Infiltration | Base Assault | Bombing | Overspawn Drop |
---|---|---|---|---|
1-3 | 100% | 0% | 0% | 0% |
4 | 90% | 0% | 10% | 0% |
5-6 | 80% | 10% | 10% | 0% |
7 | 70% | 10% | 10% | 10%* |
8 | 50% | 20% | 10% | 20% |
9-11 | 40% | 20% | 20% | 20% |
12 | 30% | 30% | 20% | 20% |
13 | 30% | 20% | 30% | 20% |
14 | 40% | 20% | 20% | 20% |
15-18 | 30% | 20% | 20% | 30% |
19 | 20% | 20% | 30% | 30% |
20+ | 10% | 40% | 20% | 30% |
*An Overspawn drop in Week 7 can't actually happen, as there are guaranteed to be no Motherships available (none have spawned yet).
Infiltration Fleets
These are the standard type of UFO incursion for the majority of the early game, which peters out as the weeks go on in favor of more direct aggression. Infiltration fleets consist of one to three primary craft, usually with escorts to protect them (as seen on the table below). When they appear in Mega-Primus, the primary craft will fly directly to a pre-selected target destination, hover over it for several seconds and attempt to deploy a squad of aliens to infiltrate the building via a transport beam (i.e. 'the grey tube'). Destroying the craft before it reaches its destination will prevent this. If the tube has already appeared, it is possible to prevent the UFO from succeessfully completing its transport by destroying it before the beam has finished. UFOs which successfully deposit their troops will then immediately move to the dimension gates to return to the Alien Dimension, leaving players to have to send squads to investigate those buildings for aliens. If left unchecked, the target organization's infiltration percentage will go up after several hours and the aliens may continue to spread to nearby buildings and organizations, creating an even bigger problem for X-Com over time. When a primary UFO craft for this mission type escapes via the dimension gates, that craft's assigned escort(s) will then immediately attempt to escape as well (this rule holds true for most if not all incursions).
Mission | Primary | Escort | Bombing | Week |
---|---|---|---|---|
1 | 1 | |||
2 | 1 | |||
3 | 2 | |||
4 | 2 | |||
5 | 2 | |||
6 | 4 | |||
7 | 3 | |||
8* | 4 | |||
9 | 3 | |||
10 | 3 | |||
11 | 4 | |||
12 | 4 | |||
13 | 5 | |||
14 | 8 | |||
15 | 8 | |||
16* | 7 | |||
17** | 7 | |||
18 | 7 | |||
19 | 8 | |||
20 | 8 |
*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.
- UFO fleets led by Transporters or Assault Ships are always on Infiltration missions.
Bombing Fleets
Likely the second or type of fleet the player will have to contend with (or third depending on luck), 'Bombing' fleets are exactly that - UFOs sent to cause as much destruction to the city, craft and X-Com as possible. These typically consist of primary craft using disruptor bombs or multi-warhead missiles while escorted by Fast Attack or stronger escort ships using medium or larger disruptor beams. On the plus side, players will not have to worry about tactical missions other than to sieze any downed UFOs, as they will not be attempting to deposit troops in buildings. These fleets will remain in the city much longer than infiltration fleets before pulling back to the alien dimension, and can cause massive damage if not left unchecked. While they can be a great source of captured UFOs and technology, a bombing fleet should never be underestimated, as it can pose one of the greatest threats to unprepared X-Com craft.
Mission | Primary | Escort | Week |
---|---|---|---|
1 | 4 | ||
2 | 4 | ||
3 | 5 | ||
4 | 4 | ||
5 | 5 | ||
6 | 6 | ||
7 | 7 | ||
8 | 9 | ||
9 | 9 | ||
10 | 8 |
- Bombing fleets appear from Week 4 onwards.
Base Assault Fleets
Mission | Primary | Escort | Week |
---|---|---|---|
1 | 5 | ||
2 | 5 | ||
3 | 5 | ||
4 | 5 | ||
5 | 5 | ||
6 | 5 | ||
7 | 5 | ||
8 | 5 | ||
9 | 7 | ||
10 | 8 |
- Base Assault fleets can appear from Week 5 onwards.
Overspawn Drop Fleets
Mission | Primary | Escort | Bombing | Week |
---|---|---|---|---|
1 | 8 | |||
2 | 8 | |||
3 | 8 | |||
4 | 8 | |||
5 | 11 |
- Overspawn drops can appear from Week 8 onwards.
- A fleet with two Motherships is guaranteed to be on an Overspawn Drop mission.