UFOs are sent out periodically to conduct a number of types of Alien Missions, some of whom the purpose is fairly inscrutable, others are fairly obvious in their reasoning. Especially once the Hyper-wave Decoder is deployed, knowing the mission of the aliens can help make strategic plans for further actions that the aliens may attempt in the near future.
List of Alien Missions
- Alien Research
- Alien Harvest
- Alien Abduction
- Alien Infiltration
- Alien Base
- Alien Terror
- Alien Retaliation
- Alien Supply
There are also a few key research topics essential to winning the game that can be uncovered by capturing and interrogating aliens, with the more important topics requiring aliens of higher rank to uncover them. Each topic can only be researched when the previous one has been completed.
|X-COM: Enemy Unknown/UFO Defense|
|Alien Missions:||Alien Origins • The Martian Solution • Cydonia or Bust • Alien Research • Alien Harvest|
|Alien Abduction • Alien Infiltration • Alien Base • Alien Terror • Alien Retaliation • Alien Supply|