The Sims 4features its fair share of occult life states, and aliens are the oldest and arguably one of the most fun. Their mental powers, human disguises, and element transmutation add a little spice to your gameplay, and most of us have wondered, at some point, if you can make your Sim into an alien.

Related:The Sims 4: Astronaut Career Guide

Unlike vampires, werewolves, mermaids, or spellcasters, there are no gameplay mechanics that let you turn an existing Sim into an alien. If you want an alien Sim in your game, and you don’t already have one, you’re going to have to either make a new Sim or use cheats to make it so.

How To Make An Alien In CAS

The absolute easiest way to make an alien in The Sims 4 isto create one from scratch in Create-A-Sim.You’llneed the Get To Work expansionbecause that’s the one that added aliens to the game.

When you boot up CAS,click the button to add a sim to the family, then click ‘create occult’ and then ‘alien’.Bing, bang, boom - you’ve got an alien Sim.

An image of a green-skinned alien in Create-A-Sim in The Sims 4.

By making an alien Sim in CAS, you can control every detail of how they look,as well as decide what their human disguise looks like.

This is probably thebest way to make an alienin Sims 4. You’renot limitedto what the game decides to throw at you, and you don’t have to do anything complicated or cheat to make your alien look the way you want to.

An image of a … colourfully dressed alien from The Sims 4, wearing an outfit that includes a broad-brimmed hat with zebra stripes and a cowboy shirt with cow spots.

How To Have An Alien Baby

If you want to add an alien Sim to an existing family, and you don’t want to just to add one through CAS,your options are a little more limited.

The only way to get a fully alien Sim in your family through gameplay is to have a Sim give birth to one, and there are two ways to do that: have your Sim getabducted by aliens or have your Sim woohoo an alien.

An image of a Sim from the Sims 4 holding an alien baby, with the achievement popup for having an alien baby in one corner.

How To Get Abducted By Aliens

To get abducted by aliens, you’ll need to have theGet To Workexpansion. With GTW, Sims can randomly get abducted by aliensbetween the hours of ten p.m. and four a.m.

A sim will suddenly get the actionInvestigate Weird Lightin their queue, which will stop any other actions they might be taking.

An image of a sim in the scientist career outfit whose stomach is glowing.

If youchange your mindwhen the buff kicks in you’ll need tokeep your Sim from going outside. Lock or delete any doors, andwait until they get bored. You can also change the abduction settings using the Satellite Dish.

The alien abduction rate was lowered, so to make your Sim get abducted,you’ll need to do everything you can to increase your chances.First off, you’ll need to make a male Sim, because female Sims can get abducted by aliens,but all they get out of the bargain is a moodlet.

An image of the Curious’s house from Sims 2 recreated in Sims 4; a Sim is using the telescope to look at the sky at night.

If you play with thecustom gender options,a male sim with the female frame who gets abducted will come back pregnant, but a female sim with the male frame will not.

Second, you’ll want to make your Simjoin the Scientist career.Scientists are more likely to get abducted by aliens, to begin with, andthey get special objects that increase their chances.

A Sims 4 Sim using the giant microscope while wearing the top-of-career science outfit.

The satellite dish, Out Of This World desktop, the wormhole generator, and space rocksall make it more likely that you’ll be abducted. You can also use thesatellite dish or desktop toContact Aliens, pushing your chances up even more.

Male Sims who get abducted by aliens have a25 percent chanceof coming back pregnant. You might need to get abducted a couple of times but try hard enough, andeventually, you’ll come back pregnant.

An image of the text of the third trimester alien pregnancy moodlet from Sims 4.

You’ll know your sim is pregnant if he gets the Weird Tummy Ache moodlet.

The pregnancy works exactly like a normal sim pregnancy, withits custom moodlets. When your Sim does eventually give birth, their offspring will be a pure alien,with all the alien powers and a human disguise.

An image of a Sim from The Sims 4 holding an alien baby.

This is the easiest wayto get a pure alien Sim through gameplay.

How To Have An Alien Baby Through Woohoo

Scared of probes and unspeakable experiments? Want the parent to be a female Sim? you may alwaysfind an alien Simandhave a baby with them, just like any other Sim.

Aliens live among regular Sims, wearing human disguises. It’s a bit sus, but hey, it works for them, andany townie that isn’t one of the known premade Simsmight be an alien in disguise.

An image of two Sims 4 sims on a couch. One Sim is putting an arm around the other sim’s shoulders.

How To Find An Alien

There are a couple of different things you can do tofind an alien.First, you can try to get them into anintense mood- an alien Sim in an intense mood will start to glow.

Second, you may ask for andanalyze their DNA,because an alien Sim willshow up as an alien on a DNA scan. You can use theScientist career satellite to scan the town, and sometimes, an alien Sim will show up.

A Sim offering a rose to an alien Sim.

Finally, you can justgo for it andtry to woohoo, because when you woohoo an alien Sim, the game will tell you that you woohoo-ed an alien.

Once you’ve found your alien,you need to have a baby. For alien/human pregnancies,you need a male/female couple, as female aliens can only have a baby with male humans, and vice versa.

If you can’t find an alien of the appropriate sex, you could also choose tohave a science babywith an alien.

However, if you choose to have a baby with an alien,it might not be a true alien baby. A Sim and an alien are morelikely to produce ahuman-alien hybrid.

Hybrid Sims don’t have any alien powers; they have funky skin tones, eyes, or pointy ears,but they can’t disguise themselves as a regular Sim.As a consolation prize, they get real hair.

Two hybrid Sims have a chance to have a true alien baby,it’s about a 50 percent chance for a hybrid, 25 percent for a normal human, or 25 percent for a true alien.

Related:The Sims 4: How To Change Your Sim’s Appearance

Use A Cheat Code To Create An Alien Sim

What if you want one of yourexisting Simsto become an alien? Well, there’s no good way to do that in the game right now. There’s a gameplay method to make just about any other kind of occult, but there’sno way to make a Sim an alien through gameplay, aside from giving birth to one.

However, in the game’s code, occult Sims are justSims with a special, hidden trait.By equipping that trait onto an ordinary Sim,you can create an occult Sim more easily.

Hit Ctrl-Shift-Cto enter the cheat console, and then, typetestingCheats on. This puts the game into debug mode; certain cheats won’t work if testing cheats are off.

Once you’ve done that, type or copy-pastetraits.equip_trait trait_OccultAlieninto the cheat console. This will turn your Sim into an alien.

You won’t see any changes at first, butclick alter disguise,go into CAS, and hit the check mark. You should now have an alien Sim!

Use A Mod To Create An Alien

You may want a littlemore control over your new alien’s appearance.Maybe you want their face to be the same in alien form and Sim form; maybe you want your aliens to have hair, ormaybe you want to make their alien form and Sim form to look identical.

Even with cheats,you’re not going to be able to do that in-game. Unlike with vampires, you’re able to’t copy a Sim’s disguise over to their alien form or vice versa. Fortunately,modders have provided a solution.

First, youneed to install MCCC. Next,save your alien Simto your library.

Add a copy of your aliento the family, and using MCCC, make one of them human while in disguise. You should now havetwo Sims in the family– one who looks alien, andone who’s the human version of your alien’s disguise.

Select your human Sim, and go into theMC CAS menu.You can selectCopy Face, Copy Physique, and/orCopy Body Appearance.Then, select your alien Sim, and go into the same menu. SelectPaste Face, Paste Physique, and/orPaste Body Appearance.

Go into CAS (through the cheat menu after entering cas.fulleditmodeon or through MCCC’s menu, not through Alter Disguise), and click the checkmark.

If you go into CAS through Alter Disguise,your changes to your Sim’s face won’t save!

Your alien Sim should now be an exact copy of their disguise, in both facial features and body. You can do the same trick in reverseif you want your alien Sim to have pointy ears in human form.