All Alien Powers And Abilities in The Sims 4
This guide will cover all alien powers and abilities in The Sims 4.
When aliens use their abilities, they receive a tense moodlet for two hours and consume a large amount of your Sim’s brainpower. Due to this brainpower strain, there is a cooldown period of a few hours. One of the abilities you can use is Analyze Personality, which reveals all the traits of another Sim.

The Empathize interaction has no cooldown. When you use it on another Sim, you receive a +1 moodlet that lasts for four hours. For example, if the target Sim is angry, you will also become angry, and if they are focused, you will become focused as well.

Erase Memory is the strongest alien ability. This interaction gives your Sim a dazed moodlet, but it only affects the target Sim, not the alien Sim. The Sim will remain in the relationship panel, but the relationship between the target Sim and your alien Sim will reset to zero.

If your alien goes out in public, relationships may take longer to build, and Sims can become angry when they discover you are an alien. Aliens also have disguises that make them look like regular Sims, allowing them to blend in during daily activities. You can edit the Sim at any time and change the alien Sim’s facial structure.

When using a disguise in public, people will not know you are an alien, so they will not get angry. This is also useful for role-playing and storytelling. Aliens can transmute items from the crystal collection into different random objects from the same collection.

Objects can also be transmuted into different collections, turning crystals into elements. The alien collection is divided into two variants: five alive and five dead. Alien Sims can revive dead alien collectibles into their live variants, as shown below.

Aliens can also study rocks from the space rock collection. When interacting with them, they receive a happy moodlet for four hours, as it reminds them of their home. Aliens can use a unique mischief interaction called Scare with Probe, which makes the target Sim tense.

When two alien Sims meet, they can perform a secret handshake. Aliens experiencing strong emotions will have a faint glow around them. If they are in their natural form, the easiest way to uncover a disguised alien is by encountering them in public.

Hybrid aliens are half-alien Sims born as a mix of human and alien. They have alien skin color and tone but normal human eyes. They cannot use all alien powers, such as Analyze Personality or Erase Memory, and they do not have disguises, as shown below.
