Difference between revisions of "Alien Submarines"
m (→Alien Submarine Overview: correcting terminology) |
|||
(31 intermediate revisions by 12 users not shown) | |||
Line 1: | Line 1: | ||
− | The ''' |
+ | The '''Alien Submarines''' used by the aliens of ''[[TFTD|Terror from the Deep]]'' are big, blocky, shapes which resemble sea creatures and lack most forms of aerodynamics. They are able to dive and fly at breakneck speeds through the power of [[Zrbite]] and the resiliency of [[Aqua Plastics]]. Alien Subs come in a variety of forms ranging from the tiny Survey Ships right up to the massive Dreadnoughts. |
− | + | Alien Subs are the aliens' sole method to move around Earth, and collect resources, so in theory, it would be possible to halt the alien advance if [[X-COM]] could maintain absolute naval superiority. Earth's forces do not initially have the resources required for such a task, and even if it becomes possible, the aliens have an vast resource supply and will not be set back by a war of attrition. In addition, alien undercover agents will continue to erode Earth's defenses from the inside. |
|
− | Despite this, commanders should still down as many |
+ | Despite this, commanders should still down as many Alien Subs as possible. At the very least, it may slow the aliens down some. |
+ | [[UFOs]] are the equivalent in ''[[X-COM|UFO: Enemy Unknown]]''. The third game in the series, ''[[Apocalypse]]'', introduced [[Alien Ships (Apocalypse)|another fleet]]. |
||
− | ==USO Types== |
||
− | The aliens use special submerging vehicles known as USOs. The USOs deployed by the aliens range in size and the mission profiles they are most commonly seen on, some are also much more common to certain of the alien races encountered. |
||
− | == |
+ | ==Alien Submarine Overview== |
+ | <table {{StdCenterTable}} class="sortable"> |
||
− | [[Survey Ship]] - Very Small USO. Primarily used for research. |
||
+ | <tr {{StdDescTable_Heading}}><th width="160">Craft</th><th width="90">Size</th><th width="110">Max Speed</th><th width="90">Escape Time*</th><th width="110">Weapon Power</th><th width="140">Weapon Range (km)**</th><th width="110">Firing Interval***</th><th width="110">Damage Capacity</th><th width="100">Points (Downed)</th><th width="110">Points (Destroyed)</th></tr> |
||
+ | <tr><td align="left">[[Survey Ship]]</td><td>Very Small</td><td>2,000</td><td>200</td><td>0</td><td>0</td><td>N/A</td><td>60</td> <td>50</td><td>100</td></tr> |
||
+ | <tr><td align="left">[[Escort]]</td><td>Small</td><td>2,800</td><td>250</td><td>30</td><td>13</td><td>56</td><td>300</td><td>75</td><td>150</td></tr> |
||
+ | <tr><td align="left">[[Cruiser]]</td><td>Small</td><td>2,600</td><td>300</td><td>25</td><td>35</td><td>48</td><td>300</td><td>125</td><td>250</td></tr> |
||
+ | <tr><td align="left">[[Heavy Cruiser]]</td><td>Medium</td><td>3,800</td><td>500</td><td>60</td><td>20</td><td>48</td><td>450</td><td>250</td><td>****</td></tr> |
||
+ | <tr><td align="left">[[Hunter]]</td><td>Medium</td><td>4,500</td><td>500</td><td>50</td><td>18</td><td>32</td><td>500</td><td>250</td><td>****</td></tr> |
||
+ | <tr><td align="left">[[Battleship (TFTD)|Battleship]]</td><td>Large</td><td>4,200</td><td>2,000</td><td>140</td><td>50</td><td>24</td><td>1,400</td><td>500</td><td>****</td></tr> |
||
+ | <tr><td align="left">[[Dreadnought]]</td><td>Very Large</td><td>4,800</td><td>4,000</td><td>120</td><td>60</td><td>24</td><td>3,400</td><td>700</td><td>****</td></tr> |
||
+ | <tr><td align="left">[[Fleet Supply Cruiser]]</td><td>Large</td><td>3,400</td><td>3,000</td><td>70</td><td>38</td><td>24</td><td>2,000</td><td>400</td><td>****</td></tr> |
||
+ | </table> |
||
+ | <nowiki>*</nowiki> Actual interval before an Alien Sub flees is calculated by randomly increasing this value by 0-100%, then subtracting 30 per difficulty level. For example, the Escort on Superhuman (difficulty 6 in the game code) will attempt to flee after 70-320 frames. The Acceleration value in the in-game [[UFOpedia]] is not used. |
||
− | ===Small USOs=== |
||
− | [[Escort]] - Able to fill a variety of roles. |
||
+ | <nowiki>**</nowiki> The figures given in the in-game [[UFOpedia]] are a factor of 8 too high, relative to [[Sub Armaments|Sub Armament]] ranges. |
||
− | [[Cruiser]] - Slightly larger than the Escort. Very versatile. |
||
+ | <nowiki>***</nowiki> Actual interval between Alien Sub attacks is calculated by subtracting 2 per difficulty level from this value, then randomly increasing the result by 0-100%. For example, the Dreadnought on Superhuman (difficulty 6 in the game code) will fire every 12 to 24 frames (average 18). |
||
− | ===Medium USOs=== |
||
− | [[Heavy Cruiser]] |
||
+ | <nowiki>****</nowiki> Only the Survey Ship, Escort and Cruiser can be destroyed. |
||
− | [[Hunter]] |
||
+ | *All Alien Sub weapons have an accuracy of 60%. |
||
− | ===Large USOs=== |
||
− | [[Fleet Supply Cruiser]] - Large-sized USO for tranportation of aliens, food, and other supplies. |
||
+ | == Weapons vs. Alien Submarines == |
||
− | [[Battleship_(TFTD)|Battleship]] - Large USO used to unleash assault teams and [[Terror Units]] on residential areas. |
||
+ | <center> |
||
− | ===Very Large USOs=== |
||
+ | <table {{StdCenterTable}} width="80%"> |
||
− | [[Dreadnought]] - Very Large USO used to intimidate Earth's peoples and leaders, and to assault [[X-COM]] bases, along with a variety of other roles. |
||
+ | <tr {{StdDescTable_Heading}}><th>Craft</th> |
||
+ | <th>Vmax</th></tr> |
||
+ | <tr><td>[[Barracuda]]</td><td>2400</td></tr> |
||
− | ==Quick Comparision Table== |
||
+ | <tr><td>[[Manta]]</td><td>4600</td></tr> |
||
− | <table {{StdCenterTable}} width="60%"> |
||
+ | <tr><td>[[Hammerhead]]</td><td>4030</td></tr> |
||
− | <tr {{StdDescTable_Heading}}><th>Craft</th><th width="80">Size</th><th width="80">Max Speed</th><th width="80">Weapon Power</th><th width="80">Weapon Range*</th><th width="80">Damage Capacity</th><th width="80">UFO Grounded points</th><th width="80">UFO Destroyed points</th></tr> |
||
− | + | <tr><td>[[Leviathan]]</td><td>5800</td></tr> |
|
− | <tr><td align="left">Escort</td><td>Small</td><td>2,800</td><td>30</td><td>104</td><td>300</td><td>75</td><td>150</td></tr> |
||
− | <tr><td align="left">Cruiser</td><td>Small</td><td>2,600</td><td>25</td><td>280</td><td>300</td><td>125</td><td>250</td></tr> |
||
− | <tr><td align="left">Heavy Cruiser</td><td>Medium</td><td>3,800</td><td>60</td><td>160</td><td>450</td><td>250</td><td>500</td></tr> |
||
− | <tr><td align="left">Hunter</td><td>Medium</td><td>4,500</td><td>50</td><td>144</td><td>500</td><td>250</td><td>500</td></tr> |
||
− | <tr><td align="left">Fleet Supply Cruiser</td><td>Large</td><td>3,400</td><td>70</td><td>304</td><td>2,000</td><td>400</td><td>800</td></tr> |
||
− | <tr><td align="left">Battleship</td><td>Large</td><td>4,200</td><td>120</td><td>400</td><td>1,400</td><td>500</td><td>1,000</td></tr> |
||
− | <tr><td align="left">Dreadnought</td><td>Very Large</td><td>4,800</td><td>140</td><td>480</td><td>3,400</td><td>700</td><td>1,400</td></tr> |
||
</table> |
</table> |
||
+ | </center> |
||
− | <nowiki>*</nowiki> The figures given in the in-game [[UFOpaedia]] are a factor of 8 too high, relative to [[Sub_Armaments|Sub Armament]] ranges. |
||
+ | |||
+ | |||
+ | <center> |
||
+ | <table {{StdCenterTable}} width="80%"> |
||
+ | <tr {{StdDescTable_Heading}}><th>Armament</th> |
||
+ | <th>Damage</th> |
||
+ | <th>Range (km)</th> |
||
+ | <th>Accuracy</th> |
||
+ | <th>Shots</th></tr> |
||
+ | |||
+ | <tr><td>Craft Gas Cannon</td><td>15</td><td>8</td><td>25%</td><td>200</td></tr> |
||
+ | <tr><td>AJAX</td><td>60</td><td>32</td><td>70%</td><td>6</td></tr> |
||
+ | <tr><td>D.U.P. Head</td><td>110</td><td>50</td><td>80%</td><td>3</td></tr> |
||
+ | <tr><td>Gauss Cannon</td><td>90</td><td>20</td><td>35%</td><td>50</td></tr> |
||
+ | <tr><td>Sonic Oscillator</td><td>150</td><td>55</td><td>50%</td><td>100</td></tr> |
||
+ | <tr><td>P.W.T. Cannon</td><td>200</td><td>60</td><td>100%</td><td>2</td></tr> |
||
+ | </table> |
||
+ | </center> |
||
+ | |||
+ | (See [[Sub_Armaments#Quick Comparison Table|Quick Comparison Table]] for rate of fire, firepower and total payload information.) |
||
+ | |||
+ | If your craft is faster, the Alien Sub cannot escape; if your weapons have a higher range than the Alien Sub's, you'll be entirely safe from return fire. |
||
+ | |||
+ | * Sonic Oscillators can be used (even by Barracudas) with impunity against any Alien Submarines except Dreadnoughts. Even against Dreadnoughts, Sonic Oscillators are better than P.W.T. Launchers because a minimum of ''four'' P.W.T.-armed craft are required to down a Dreadnought. |
||
+ | * Single craft with dual DUPs (expected total damage = 396) are sufficient to bring down any Small or Medium Alien Subs. 3 craft with dual DUPs are needed to defeat a Fleet Supply Cruiser. DUPs cannot be used safely against Battleships (unlike UFO's Avalanche, which outranges Terror Ships). |
||
+ | * A single craft armed with dual Gauss Cannon (expected total damage = 2362.5) could expect reliably to bring down any craft, including a Dreadnought - provided it can survive long enough. |
||
+ | * A single craft armed with humble dual '''Gas''' Cannon (expected total damage = 1125) could also expect reliably to bring down any craft except a Dreadnought - again, provided it can survive long enough. (It will need to survive 40% longer than a Gauss Cannon-equipped craft, as the Gauss Cannon has 40% more [[Sub_Armaments#Quick Comparison Table|firepower]]). |
||
+ | |||
+ | == X-Com Subs vs. Alien Subs == |
||
+ | * The Barracuda can always catch Survey Ships for the Barracuda is faster, but it often cannot dive deep enough to engage its target. |
||
− | == Weapons vs. USOs == |
||
+ | * The Manta is faster than all Alien Subs EXCEPT the Dreadnought. |
||
− | Comparing the weapon range and damage capacity of UFOs to the range and damage of sub armaments, one can discern that: |
||
+ | * The Hammerhead can intercept all Alien Subs except the Hunter, the Battleship, and the Dreadnought, which must slow down in order for the Hammerhead to catch up. |
||
+ | * The Leviathan is 1000 speed units faster than even the mighty Dreadnought and can intercept all Alien Subs. |
||
+ | <br /> |
||
+ | == Quirks == |
||
− | * Any weapon, even the lowly [[Craft Gas Cannon]], can be used against Survey Ships, since they can't shoot back. |
||
− | * [[AJAX Torpedo]]es, with a range of 32km, are completely safe to use against Escorts, and can even be used to safely down Heavy Cruisers and Hunters.(Shouldn't the Heavy Cruiser be better than the Cruiser? Oh well...) |
||
− | * [[D.U.P. Head Torpedo]]es or [[Sonic Oscillator]]s should be used against Cruisers due to their weapon range of 35km. |
||
− | * D.U.P. Head Torpedoes can fire on all but the Battleship and Dreadnought with impunity. |
||
− | * Gauss Cannons, with a range of 20km, can be safely used against the Survey Ship, Escort, and Hunter. However, D.U.P. Head Torpedo-armed craft are of use against a larger variety of craft and Sonic Oscillators, once they become available, are superior in every regard. |
||
− | * Sonic Oscillators can safely be used (even by Barracudas) against any USOs except Dreadnoughts. Even against Dreadnoughts, Sonic Oscillators are better than P.W.T. Launchers because a minimum of ''four'' P.W.T.-armed craft are required to down a Dreadnought. |
||
+ | *The floor maps & schematic pictures of the Survey Ship and Escort are swapped with each other in the Battlescape, the Interception window and the UFOPaedia. |
||
− | == Subs vs. USOs == |
||
+ | *The schematic pictures of the Battle Ship and the Fleet Supply Cruiser are also swapped in the UFOPaedia and Intercept window. The floorplan maps on the Battlescape are not affected. |
||
+ | ==See Also== |
||
− | * The Barracuda can always be used effectively against Survey Ships, for the Barracuda is faster. |
||
+ | {{Alien Sub Navbar}} |
||
− | * The Manta is faster than all USOs EXCEPT the Dreadnought. |
||
+ | [[Category:Alien Submarines (TFTD)]] |
||
− | * The Hammerhead can intercept all USOs except the Hunter, the Battleship, and the Dreadnought, which must slow down in order for the Hammerhead to catch up. |
||
+ | [[Category:TFTD]] |
||
− | * The Leviathan is 1000 speed units faster than even the mighty Dreadnought and can intercept all alien USOs. |
Latest revision as of 05:32, 6 August 2018
The Alien Submarines used by the aliens of Terror from the Deep are big, blocky, shapes which resemble sea creatures and lack most forms of aerodynamics. They are able to dive and fly at breakneck speeds through the power of Zrbite and the resiliency of Aqua Plastics. Alien Subs come in a variety of forms ranging from the tiny Survey Ships right up to the massive Dreadnoughts.
Alien Subs are the aliens' sole method to move around Earth, and collect resources, so in theory, it would be possible to halt the alien advance if X-COM could maintain absolute naval superiority. Earth's forces do not initially have the resources required for such a task, and even if it becomes possible, the aliens have an vast resource supply and will not be set back by a war of attrition. In addition, alien undercover agents will continue to erode Earth's defenses from the inside.
Despite this, commanders should still down as many Alien Subs as possible. At the very least, it may slow the aliens down some.
UFOs are the equivalent in UFO: Enemy Unknown. The third game in the series, Apocalypse, introduced another fleet.
Alien Submarine Overview
Craft | Size | Max Speed | Escape Time* | Weapon Power | Weapon Range (km)** | Firing Interval*** | Damage Capacity | Points (Downed) | Points (Destroyed) |
---|---|---|---|---|---|---|---|---|---|
Survey Ship | Very Small | 2,000 | 200 | 0 | 0 | N/A | 60 | 50 | 100 |
Escort | Small | 2,800 | 250 | 30 | 13 | 56 | 300 | 75 | 150 |
Cruiser | Small | 2,600 | 300 | 25 | 35 | 48 | 300 | 125 | 250 |
Heavy Cruiser | Medium | 3,800 | 500 | 60 | 20 | 48 | 450 | 250 | **** |
Hunter | Medium | 4,500 | 500 | 50 | 18 | 32 | 500 | 250 | **** |
Battleship | Large | 4,200 | 2,000 | 140 | 50 | 24 | 1,400 | 500 | **** |
Dreadnought | Very Large | 4,800 | 4,000 | 120 | 60 | 24 | 3,400 | 700 | **** |
Fleet Supply Cruiser | Large | 3,400 | 3,000 | 70 | 38 | 24 | 2,000 | 400 | **** |
* Actual interval before an Alien Sub flees is calculated by randomly increasing this value by 0-100%, then subtracting 30 per difficulty level. For example, the Escort on Superhuman (difficulty 6 in the game code) will attempt to flee after 70-320 frames. The Acceleration value in the in-game UFOpedia is not used.
** The figures given in the in-game UFOpedia are a factor of 8 too high, relative to Sub Armament ranges.
*** Actual interval between Alien Sub attacks is calculated by subtracting 2 per difficulty level from this value, then randomly increasing the result by 0-100%. For example, the Dreadnought on Superhuman (difficulty 6 in the game code) will fire every 12 to 24 frames (average 18).
**** Only the Survey Ship, Escort and Cruiser can be destroyed.
- All Alien Sub weapons have an accuracy of 60%.
Weapons vs. Alien Submarines
Craft | Vmax |
---|---|
Barracuda | 2400 |
Manta | 4600 |
Hammerhead | 4030 |
Leviathan | 5800 |
Armament | Damage | Range (km) | Accuracy | Shots |
---|---|---|---|---|
Craft Gas Cannon | 15 | 8 | 25% | 200 |
AJAX | 60 | 32 | 70% | 6 |
D.U.P. Head | 110 | 50 | 80% | 3 |
Gauss Cannon | 90 | 20 | 35% | 50 |
Sonic Oscillator | 150 | 55 | 50% | 100 |
P.W.T. Cannon | 200 | 60 | 100% | 2 |
(See Quick Comparison Table for rate of fire, firepower and total payload information.)
If your craft is faster, the Alien Sub cannot escape; if your weapons have a higher range than the Alien Sub's, you'll be entirely safe from return fire.
- Sonic Oscillators can be used (even by Barracudas) with impunity against any Alien Submarines except Dreadnoughts. Even against Dreadnoughts, Sonic Oscillators are better than P.W.T. Launchers because a minimum of four P.W.T.-armed craft are required to down a Dreadnought.
- Single craft with dual DUPs (expected total damage = 396) are sufficient to bring down any Small or Medium Alien Subs. 3 craft with dual DUPs are needed to defeat a Fleet Supply Cruiser. DUPs cannot be used safely against Battleships (unlike UFO's Avalanche, which outranges Terror Ships).
- A single craft armed with dual Gauss Cannon (expected total damage = 2362.5) could expect reliably to bring down any craft, including a Dreadnought - provided it can survive long enough.
- A single craft armed with humble dual Gas Cannon (expected total damage = 1125) could also expect reliably to bring down any craft except a Dreadnought - again, provided it can survive long enough. (It will need to survive 40% longer than a Gauss Cannon-equipped craft, as the Gauss Cannon has 40% more firepower).
X-Com Subs vs. Alien Subs
- The Barracuda can always catch Survey Ships for the Barracuda is faster, but it often cannot dive deep enough to engage its target.
- The Manta is faster than all Alien Subs EXCEPT the Dreadnought.
- The Hammerhead can intercept all Alien Subs except the Hunter, the Battleship, and the Dreadnought, which must slow down in order for the Hammerhead to catch up.
- The Leviathan is 1000 speed units faster than even the mighty Dreadnought and can intercept all Alien Subs.
Quirks
- The floor maps & schematic pictures of the Survey Ship and Escort are swapped with each other in the Battlescape, the Interception window and the UFOPaedia.
- The schematic pictures of the Battle Ship and the Fleet Supply Cruiser are also swapped in the UFOPaedia and Intercept window. The floorplan maps on the Battlescape are not affected.