Here is the full list of all 12 UFO Sightings Simulator Demo achievements.
Take a picture of a weird alien police box.
Complete the tutorial mission.
Sell a photo of a rare or higher UFO.
Buy the motorbike.
Buy you first cow.
Complete the demo.
Drink water from the sink.
Sleep for more than 12 hours.
Take a photo of another island.
Experience your first abduction.
Earn 10k dollars.
Feed and pet Allison.