Alien Missions (TFTD)
The Aliens will periodically send out their submarines to conduct various types of missions. Some will score points for the Aliens if successful (and thus effectively lower X-COM's monthly score), while others will present a more direct threat to X-COM or its sponsors. A Transmission Resolver will reveal the mission any detected Alien sub is performing. Otherwise, X-COM can only make educated guesses based on the type, number and behavior of subs that are detected.
Interrogating a live Alien Squad Leader will reveal general information about one randomly selected Alien mission.
Alien Probe Mission
| Alien Probe Mission |
| The Alien Probe Mission is used for correlating data about the seabed, the resources, shipping and aeroplane flight paths of an area. The Alien subs involved in these missions are not a major threat in themselves, but they indicate sites of activity that may flare at any time. |
Source: Terror From The Deep Ufopaedia
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The Aliens do not directly score for completing this mission.
Sub Type Lands? Time 1 Survey Ship No 150h? (2.5h exactly for first month) 2 Escort x1 150h 3 Cruiser x2 130h 4 Cruiser x2 150h
Alien Interdiction
| Alien Interdiction |
| The Aliens have a policy of policing areas they are interested in, sending out craft with the express purpose of securing an area before more intensive missions are begun. They will land at specific sites they intend to raid later to lock down the areas and prepare the way for the next level of activity. |
Source: Terror From The Deep Ufopaedia
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The Aliens will score 30[Verify?] points each time an Interdiction mission is successfully performed. This is applied each time one of their subs sets off after having touched down and performed the mission, unless it is successfully assaulted by X-COM while touched down.
Sub Type Lands? Time 1 Survey Ship No 130h? 2 Survey Ship x1 130h 3 Escort x1 130h 4 Cruiser No 100h 5 Cruiser x1 130h 6 Heavy Cruiser x2 150h 7 Heavy Cruiser x2 50h 8 Dreadnought x1 12.5h
Alien Resource Raid
| Alien Resource Raid |
| The sinking of ships and the downing of aircraft are key elements of the Alien strategy. The acquisition of materials is one of the prime Alien activities and as such is allied to these overtly aggressive acts. The Aliens also raid areas of geo-thermal activity, mining sites and sites of antiquity for minerals and refined metals and other human produced items. |
Source: Terror From The Deep Ufopaedia
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The Aliens will score 50[Verify?] points each time an Resource Raid mission is successfully performed. This is applied each time one of their subs sets off after having touched down and performed the mission, unless it is successfully assaulted by X-COM while touched down.
Sub Type Lands? Time 1 Survey Ship No 250h? 2 Escort x2 250h 3 Cruiser x1 300h 4 Hunter x1 150h 5 Hunter x2 150h 6 Hunter x2 1h
Alien Infiltration
| Alien Infiltration |
| This can result in official contact between Aliens and corporations or governments at the highest level. The climax of this activity is characterised by intense Alien Sub activity in the waters of the organisation concerned. The Aliens will attempt to sign an agreement with a government or organisation by offering knowledge of their superior technologies. This Alien activity represents a major threat to X-COM. If a corporation or government co-operates with the invaders then its funding ceases. |
Source: Terror From The Deep Ufopaedia
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The Aliens will score 150[Verify?] points each time an Infiltration mission is successfully performed. More importantly, the affected government will cease all X-COM funding permanently. In addition, the aliens will establish a Colony in the sea near the country, which will score them 5 points each day it is active.
Sub Type Lands? Time 1 Survey Ship ? ?? 2 Escort ? 275h 3 Escort ? 250h 4 Cruiser ? 230h 5 Cruiser ? 150h 6 Battleship ? 1h 7 Fleet Supply Cruiser ? 1h 8 Dreadnought ? 1h 9 Dreadnought ? 1h
Alien Colony Expansion
| Alien Colony Expansion |
| These colonies are known to contain labs, cloning centres, surgical facilities for human and Alien experimentation. The presence of Alien colonies will generate more Alien activity without the presence of Alien Subs. In order to locate a colony an X-COM sub must patrol an area for a few hours to stand some chance of successful detection. |
Source: Terror From The Deep Ufopaedia
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The Aliens will score 50[Verify?] points each time they successfully establish a Colony. In addition, they will score 5 points each day the Colony is active.
Sub Type Lands? Time 1 Survey Ship x2 ?? 2 Escort x2 150h 3 Cruiser x2 250h 4 Fleet Supply Cruiser x2 1h 5 Fleet Supply Cruiser x2 1h 6 Dreadnought x1 1h
Alien Surface Attacks
| Alien Surface Attacks |
| When the Aliens need humans they terrorise a port, attack an island, or raid a ship. Civilians will be directly threatened, to fulfil the perverse breeding needs of the Aliens and their hideous experiments. |
Source: Terror From The Deep Ufopaedia
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Popularly known as a Terror Mission. The Aliens will score 1000[Verify?] points if X-COM does not react to the resulting Terror Site before it disappears. If X-COM responds, scoring will be calculated according to the results of the mission.
Sub Type Lands? Time 1 Escort x2 2.5h exactly 2 Cruiser x2 250h 3 Battleship No 160h 4 Battleship x1* 200h (produces a Port Attack or Island Attack site when it lands)
Floating Base Attack
| Floating Base Attack |
| If X-COM intercept subs are being particularly successful in sinking Alien craft then the Aliens may take some aggressive retaliatory action. This could result in a direct attack against an X-COM facility. However, the Aliens have to find an X-Com base in order to attack it, and provided Alien Subs are kept away then there should be little danger of an assault. |
Source: Terror From The Deep Ufopaedia
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The Aliens do not directly score for this mission. But if they discover an X-COM base, they will send a Dreadnought to assault it, which will produce a Base Defense Mission.
Sub Type Lands? Time (Search phase, will terminate prematurely if base is found) 1 Survey Ship No ?? (2.5h exactly if scheduled) 2 Escort No 50h 3 Escort No 50h 4 Cruiser No 50h 5 Cruiser No 50h 6 Cruiser No 50h (may not appear) 7 Dreadnought No 50h 8 Dreadnought No 50h (Assault phase) 1 Dreadnought x1* ?? (produces a Base Defence mission when it lands)
Colony Supply Missions
| Colony Supply Missions |
| Once an Alien colony is constructed then it is re-supplied on a regular basis by a special supply ship. If one of these vessels is detected while touching down then it is certain that an Alien colony is nearby. |
Source: Terror From The Deep Ufopaedia
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Once an Alien Colony is established, the Aliens will periodically send a Fleet Supply Cruiser to resupply it. It will be crewed by the same race that built the Colony. The Aliens do not directly score for completing this mission.
Sub Type Lands? Time 1 Fleet Supply Cruiser x1 0.5h exactly, may occur on any day