What MCCC does and where to find the relationship tools

MCCC (MC Command Center) is a mod that adds a command menu to The Sims 4, letting you change relationships between Sims without playing through the interactions that normally build them. Once installed, you open the mod's menu in-game and navigate to the relationship section, where you can raise or lower friendship, romance, or family bonds when ready.

MCCC is one of the most widely used mods for The Sims 4 because it handles dozens of game systems — not just relationships. You read it from Deaderpool's Patreon page (the creator's name) or from mod sites like ModTheSims. The relationship tools are built into the main mod, so you do not need a separate read once MCCC is installed.

The mod works by intercepting the game's relationship system and letting you set values directly instead of waiting for Sims to interact. This is useful if you want to start a save with Sims already in love, skip the early friendship grind, or undo a relationship you accidentally broke.

Key Takeaways

  • Open the MCCC menu in-game by holding Shift and clicking your Sim, then navigate to Relationships to see all available relationship types.
  • Relationship values in MCCC range from -100 to 100, where negative numbers mean dislike and positive numbers mean friendship or romance.
  • You can change relationships between any two Sims in your household or in the world, even if they have never met.
  • MCCC saves relationship changes to your save file, so they persist when you reload the game.
  • If a relationship change causes unexpected behavior, you can undo it by opening MCCC again and adjusting the value back.

Opening MCCC and navigating to relationships

To access MCCC in-game, hold Shift and click on the Sim whose relationships you want to change. A menu appears with several options. Look for a section labeled "Relationships" or "MC Relationship" — the exact name depends on your MCCC version, but it is always in the main menu that appears after you click the Sim.

Once you click Relationships, you see a list of every Sim your selected Sim knows or has a relationship with. If you want to create a relationship with a Sim they have never met, scroll to the bottom of the list and look for an option to add a new relationship or search for a Sim by name. This lets you build a bond between two Sims who have never interacted.

The menu shows relationship types as separate rows: Friendship, Romance, Family, and sometimes others depending on your mod version. Each type has its own value that you can adjust independently. A Sim can have high friendship and low romance with the same person, for example.

Understanding relationship values and what they mean

MCCC uses a scale from -100 to 100 for most relationships. A value of 0 means neutral — the Sims have no particular feeling toward each other. Positive numbers (1 to 100) represent friendship or romance, with higher numbers meaning stronger bonds. Negative numbers (-1 to -100) represent dislike, with lower numbers meaning stronger animosity.

In practice, a friendship value of 50 or higher usually means the Sims will interact positively and may become best friends. A romance value of 50 or higher means they are attracted to each other and can pursue romantic interactions. A value of -50 or lower means they actively dislike each other and may argue or refuse to interact.

The exact behavior depends on the Sims' traits and the game's other systems, but these ranges are a reliable guide. If you want two Sims to be casual friends, set friendship to 30 or 40. If you want them to be in love, set romance to 75 or higher. If you want them to hate each other, set the value to -60 or lower.

Changing a relationship step by step

After you open the Relationships menu and select the relationship type you want to change, you see a text field or slider showing the current value. Click on the field and type a new number between -100 and 100. Some versions of MCCC use a slider instead — drag it left for negative values and right for positive values.

Once you enter the new value, press Enter or click a Confirm button (depending on your version). The change takes effect when ready. You do not need to reload the save or restart the game. The Sims' behavior toward each other updates right away based on the new relationship value.

If you are changing a relationship for a Sim who is not in your household, you may need to navigate to them first. Some versions of MCCC let you search for any Sim in the world; others require you to click on them directly. Check the menu options to see whether you can search by name or whether you need to find them in-game.

Common relationship changes and what values to use

If you want two Sims to start as best friends, set friendship to 80 or 90. They will when ready treat each other as close companions and will want to spend time together. If you want them to be dating, set romance to 70 or higher and friendship to at least 40 — romance alone without friendship can feel one-sided.

If you want to make a Sim hate another Sim, set the relationship to -70 or lower. They will refuse to interact positively and may argue if forced into the same room. If you want them to be neutral or slightly uncomfortable, set it to -20 or -30. This creates tension without outright hostility.

For family relationships, MCCC usually has a separate Family value. This does not affect whether Sims are actually related in the game's system — it only changes how they feel about each other. You can set a high family value between unrelated Sims to make them act like close relatives, or set it low to make actual family members feel distant.

Fixing mistakes and undoing relationship changes

If you change a relationship and the Sims behave unexpectedly, you can undo it by opening MCCC again and adjusting the value back. There is no undo button in MCCC itself, but you can always re-open the menu and set the relationship to whatever value you want. This takes seconds and does not require reloading your save.

If a relationship change causes a bigger problem — like a Sim moving out or a household splitting up — you may need to reload a save from before the change. MCCC saves changes to your save file when ready, so they are permanent unless you manually undo them or load an older save. Keep backup saves if you are experimenting with large relationship changes.

Some relationship changes can trigger game events or notifications. For example, setting romance very high between two Sims might cause them to want to move in together or get married. This is the game responding normally to the new relationship value, not a bug. If you do not want these events, adjust the relationship value more gradually or use MCCC's other tools to control what happens next.

Why MCCC relationship changes sometimes do not stick

Occasionally a relationship change in MCCC does not persist after you reload your save. This usually happens if MCCC did not load correctly when the game started, or if another mod is conflicting with MCCC's relationship system. Make sure MCCC is in your Mods folder and that it loads before other mods — check your mod load order in the game's mod menu or in your Mods folder directly.

If changes are not sticking, try removing MCCC temporarily, loading your save, saving it again, and then re-adding MCCC. This forces the game to recognize MCCC's presence and can fix persistence issues. You can also check the MCCC documentation or the creator's Patreon page for known conflicts with other popular mods.

Another reason changes might not stick is if you are changing a relationship for a Sim who is not in your active household. Some versions of MCCC handle off-household Sims differently, and the change may not save properly. If this happens, try inviting the Sim to your household temporarily, making the change, and then sending them back to their original home.

Frequently Asked Questions

Can I change relationships between Sims who have never met?

Yes. MCCC lets you search for any Sim in the game world and create a relationship with them, even if your Sim has never interacted with them. This is useful if you want to start a save with pre-existing relationships or create a love interest who lives in a different household.

What happens if I set a relationship to 100 or -100?

Setting a relationship to 100 creates the strongest possible positive bond — the Sims will act as though they are deeply in love or best friends depending on the relationship type. Setting it to -100 creates the strongest possible dislike. The Sims will refuse to interact and may become hostile. Most gameplay works fine at these extremes, but some mods or game features may behave unexpectedly.

Do I need to change both Sims' relationships with each other?

No. MCCC relationship changes are one-directional by default — if you raise Sim A's friendship with Sim B, Sim B's feelings toward Sim A do not automatically change. If you want the relationship to be mutual, you need to click on Sim B and adjust their relationship with Sim A separately. This lets you create one-sided crushes or unrequited feelings.

Will changing relationships break my save or cause errors?

Relationship changes in MCCC are safe and do not corrupt your save. The mod is designed to modify the game's relationship system without damaging other data. However, very extreme changes — like making a Sim hate their spouse or best friend — can cause unexpected behavior because the game's events and interactions assume relationships follow normal progression.

Can I change relationships for Sims in other households?

Yes, but the process depends on your MCCC version. Some versions let you search for any Sim by name; others require you to click on them directly. If you cannot find a Sim in the menu, try traveling to their household, clicking on them, and making the change there. The relationship will persist even after you leave their household.