Chemistry System – Latest Version

Adding a trait allows you to add any personality trait for your sims to like or dislike! The number on the right shows how much it affects their feelings towards another sim.

The rest of the options are self-explanatory.

In Live Mode, when meeting other sims, if your sim feels something, they’ll let you know.
Their mood will also change depending on who they’re around with.

This page is where the latest version of the mod lives. You can link to this page instead of having to change links for each update.

This mod requires Scumbumbo’s XML Injector to be installed!  

Download version 9d (SimFileShare)

Release Notes


I’ve been working on updating the Chemistry System to be up to date. It is now up to date to 1.69. Previously, adding skill preferences broke the game.
All critical bugs regarding adding preferences have been fixed along with some code cleanup to make maintaining the mod easier.

The translations have been updated too.


  • Yuki – French Translation
  • Esquire Dumper – Russian Translation
  • Miaow_CC – Chinese Translation
  • Ayrthwil – Portuguese Translation
  • mqkry – Polish Translation


Thanks to these patrons for helping me keep modding!

1997, Aiden Gardner, Alexandra Iordache, alexismcmillion, Allophenic, Amanda Kenny, Amy Villanueva, Anette, Angel, annieholmes, April Marisette, Ari R, Aurore Richard, austin, Ayame Aya, Bella, Berman Comon, Beth Turvey, Bianca van den Berg, BlackPiano, Britny Ranae Muehl, Caitlyn King, Callum Jeffery, Cara-Susan Fraser, Carl’s Guides, Caroline Van Rooyen, chrs seamon, cija noakes, CJ, Claire Futrell, CNTJManoi, constanza diaz meyer, Dana Slade, Dani, Danielle Knox, Danutsa, Deanna, Desiree Lamadieu, Diogo Catanho, Dlynx Migs Manalac, dreamteam67, eee, Elias, EllenRipley426, Emi, Emily, Emma Oppenlander, erica, GE Nova, Gen Salinas, ghjdi, Gill Reid, Gill Reid, Hanneke Bywater, Hinke, Ingrid Ludvigsen, Inzilith, Jack, James Goldston, James R Jonewell, Jasmin Wilson, Jason Beck, Jaz Cooper, Jeff Tansworth, Jenna Andrews, Jenny Cala, Jesse Hoffman, jessica morris, Joe Novinson, Juan Fernando Escobar, Julian, Junk Mail, Karina Li, Kathy Lum, Kenta, Kerry McArthur, Kevin Neighbors, Kiira Christopherson, KmrHackrz, lani, Laura, Lena Marie, Life With Victoria, LiL, Lila, Lore Krajsman, Lovely Londyn, lukas, Lunaviney, Mani James, Marnie Belle, michela santori, Michele, Miguel M, Miriah Reid, missy sanders, MizoreYukii, Molly Reardon, monique, Monique, Monique, morticia flowers, Nadine, Natasha Davis, NewChallenger17, Nneka Taylor, Notability – Austin Gieselman -, Odyssea, Olayinka Joseph, Olivia Heart, OmegaLPS, osamabincapping, Parise Hinds-Green, peeradon ekapisit, Peter cellarius, Plumb, Porscia, quixoticlanguor, Rafael Veitenheimer, Rokas Kuzmickas, romy panayiotis, RĂ©mi Picard, Samantha Gamache, Sancho Rodriguez, sheila e malis, Siearra Spencer, Stephanie Soto, SweetLilja, Tammy Thomas, Tanya Willadson, tayler henry, Tess, Tiyaun rucker, TURBODRIVER, Uvonne Jones-Most, Valience, Vanesa Vega A Darme, Vanessa Metellus, Veronica Trudeau, Veronica Waters, Wakeisha, Wanda Jones-Most, William Tunnicliff-Rosser, wolf007, Yossaporn Poarung


  1. Hello! I was wondering, there is the French translation of this mod. I had it previously working just perfect, but now its in english for me. When I look in the Sims 4 Studio in the French part, it shows it in english, is it normal ? Ty for your work and on this mod aswell! Its very appreciate !

  2. Hi, I’d like to download this mod but I’m not sure how to download the Scumbumbo XML Injector. I don’t know much about mods, so can you please help me with this?

  3. Hello, I was wondering if you could tell me how to download Scumbumbo XML Injector please? I’m having trouble figuring it out.

  4. I’ve been trying the Chemistry system with the Wonderful Whims attraction system. It works well together so far! And after all, physical attraction and ‘chemistry’ as in how people click – friends, family too – are different things. Love it!

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