How to Change a Sim's Relationship Using MCCC in The Sims 4

MC Command Center (MCCC) is one of the most powerful mods available for The Sims 4, and one of its most useful features is the ability to manually edit relationships between Sims. Whether you want to instantly make two Sims best friends, set up a romantic partnership, or reset a broken relationship, MCCC gives you direct control over relationship values that the base game hides behind slow, grind-heavy gameplay.

Here's exactly how it works — and what you need to understand before you start adjusting those sliders.

What MCCC Actually Does to Relationships

In The Sims 4, every relationship between two Sims is tracked along two axes:

• Friendship — a value typically ranging from -100 to 100
• Romance — a separate value on the same scale

MCCC lets you read and manually set both of these values in real time, without cheats like modifyrelationship typed into the console. It also allows you to add or remove relationship tags — the labels like "Best Friend," "Enemy," "Girlfriend," or "Spouse" — which are separate from the raw numerical scores and sometimes don't update automatically just from changing the numbers.

This distinction matters more than most players realize. You can set a romance score to 100 and still not see "Boyfriend/Girlfriend" appear unless the tag is also assigned.

Installing MCCC Before You Begin

If you haven't already installed MCCC, the mod comes as a set of package and script files downloaded from its official distribution site (deaderpool-mccc.com). The files go into your Mods folder, typically located at:

Documents > Electronic Arts > The Sims 4 > Mods

Script mods must be enabled in your Game Options > Other settings inside The Sims 4. MCCC also requires a compatible version aligned with your current game patch — this is worth checking after every major Sims 4 update, since script mods can break when the game updates.

Step-by-Step: Changing a Relationship with MCCC 🎮

Step 1 — Click on the Sim Whose Relationship You Want to Edit

In Live Mode, click directly on the Sim you want to modify. This should be the Sim whose relationship score you're adjusting from their perspective. A pie menu will appear.

Step 2 — Open the MCCC Menu

From the pie menu, select MC Command Center, then navigate to:

MC Cheats > Relationship Cheats

Depending on your version of MCCC, this path may also appear under MC Tuner or directly as Relationship options within the main MCCC menu structure.

Step 3 — Choose the Target Sim

You'll be prompted to select the second Sim — the one you want to change the relationship with. This will open up relationship editing options specific to that pair.

Step 4 — Set Friendship and Romance Values

You'll see numeric input fields or sliders for:

• Friendship score (set between -100 and 100)
• Romance score (set between -100 and 100)

Enter your desired values. A friendship score above roughly +60–70 will typically unlock friendly relationship tags. Romance scores above similar thresholds unlock romantic status options, though exact breakpoints can vary depending on your game version and any other mods running.

Step 5 — Assign Relationship Bits (Tags) if Needed

Raw numbers don't always flip the visible label. If you want a Sim to show as Best Friend, Partner, or Enemy, you may also need to manually add the relevant relationship bit through MCCC's relationship menu.

Look for options labeled Add Relationship Bit and select the appropriate tag from the list. Common tags include:

Not every tag will be available for every Sim pair — household relationship, age, and species (human vs. occult) can affect which bits are valid.

Variables That Affect Your Results

Mod version alignment is the single biggest variable. MCCC is updated frequently, and an outdated version running against a freshly patched game can cause relationship edits to fail silently, reset on load, or produce unexpected behavior.

Other relationship mods running simultaneously can conflict with MCCC's changes. Mods that alter relationship decay, autonomy, or romance systems may overwrite values you've set, sometimes within the same game session.

Relationship type constraints also apply. Some relationship categories — like sibling bonds or parent-child links — behave differently from standard friendship or romance tracks and may require different MCCC menu paths or additional steps.

Household vs. off-lot Sims can behave slightly differently too. Editing relationships for Sims currently in the active household is generally more reliable than editing relationships between two off-lot NPCs.

What Editing Relationships Doesn't Change ✏️

Manually setting scores and bits won't always update:

• Memories or story progression history tied to how a relationship developed
• Moodlets that reference a past relationship state
• Culling behavior — unplayed Sims with high relationship scores may still be culled unless you've configured MCCC's population management settings

Some players also find that relationship edits between Sims who have had negative interaction history require resetting both the positive values and clearing negative bits before the relationship behaves naturally.

How cleanly all of this works ultimately depends on which mods you're running alongside MCCC, how frequently you play in that save, and what relationship state you're starting from.