Alien UFOs

Description
Alien UFOs, also known as Alien ships or just UFOs, are enemy extraterrestrial ships that occassionally come down from space to the player's world and attempt to abduct people before escaping again. They only spawn with disasters enabled, and a sound effect accompanying a UFO-specific symbol appears over the city where the UFO will fly over. UFOs are in the iconic "flying saucer" shape, and posess a striped grey body, a blue dome where the presumed alien pilot sits, and a light green tractor beam on the underbelly which abducts people from the player's towns and cities. They are about the size of the player's hand, and fly above and around the city they target, abducting the townsfolk.

Purpose
The purpose of Alien UFOs is to provide a disaster and a secondary antagonist which the player must defeat by grabbing the moving UFO and destroying it. Alien UFOs commonly abduct the citizenry of towns, and their landing location can be identified with a unique alien abduction symbol that shows itself above a target city. An Alien UFO will be visible coming from up above in the sky and flying towards the target location. It then will abduct citizens and fly rapidly above another citizen nearby, taking 2-4 people into the UFO via tractor beam before eventually flying upwards back into space and despawning. The UFO can travel very fast between abductions, and from start to finish, the event ends in around 20-30 seconds. Alien UFOs also provide a secondary use apart from being just an antagonist, and they are the unknown circuit material which civilisations need to go from the modern to futuristic stage. Alien UFOs are notoriously hard to catch when travelling, and can be a relatively rare event. Most players can catch the Alien UFO while it hovers to abduct a person, and although the UFO is too robust to be crushed by the God, the UFO can be thrown down into the water or ground to be rendered inoperable or completely destroyed. UFOs are one of the 2 things that can appear in the sky, the other being the Moon. UFOs also have the ability to fly out of the player's hand if they accidentally let it go after holding it for too long, and the UFO will promptly escape the player's grasp, returning back to space. There are no adverse effects to letting a UFO return to space, however all citizens caught in a UFO's tractor beam will be lost.

Disabling and Destroying UFOs
If a player wishes to destroy a UFO, first they must find the target city where the UFO will land. To do this, the player must look for the unique Alien invasion symbol that will appear, along with a special sound effect. The player should go to this location, and if they look up, they will be able to see the Alien UFO coming from space. To minimise damage, the player should grab the UFO as fast as possible to keep citizens from getting abducted, and then to destroy it, they must either crash it into the ocean or a mountain, which completely destroys the UFO in a cloud of smoke. One mistake the players should not make is to let go of a UFO after too long if they wish to crash it, as the UFO will promptly escape the player's grasp and return to space. Another thing they should not do is throw it into the void, as the UFO will be able to bounce off the bottom of the world and return back to space. These disasters are relatively rare, however vital to advancing a civilisation from Modern to the Futuristic age. By crashing a UFO in a forest, grassland, or any other flat biome not including the ocean, the UFO will crash and turn to a crash site, which can be used and investigated by scientists. However, the player should make sure not to crash it into a village itself, as it could destroy buildings and crush people.

Alien UFO Crash Sites
When an Alien UFO is crashed into a forest, grassland, or any other solid, flat biome, the UFO will turn into a UFO Crash Site. UFO Crash Sites consist of a crashed UFO with its contents spilled out along the tile, including an Alien storage box, some miscellaneous green items, chunks of the crashed UFO, a cracked observation dome, and some non-descript cartridges among other things. While in early and mid-game the UFO Crash Site seems useless apart from perhaps decoration and scaring away villagers, its use becomes apparent in the late-game when modern cities require an unknown circuitboard item to advance to the futuristic age. Many players who do not have disasters enabled must enable disasters to wait for a UFO disaster to begin, and those who have disasters enabled must crash a UFO near a city to allow scientists to begin to research the UFO crash site. As of the 4th of May 2021, the UFO Crash site has no other official uses.