Alien Missions (TFTD)
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.
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
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.
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
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.
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
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.
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
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.
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
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.
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
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.
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
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.
Sub Type Lands? Time 1 Fleet Supply Cruiser x1 0.5h exactly, may occur on any day