Sims 4 relationship cheats: every argument of modifyrelationship, spelled out

The five parameters, one at a time

Every relationship cheat page is built on this command, and none of them writes out what its parameters are.

The word count in that table is the part that trips people up. Four parameters, but six words on a normal call, because a Sim written as a name eats two of them.

SimInfoParam tries to read the next word as an integer Sim ID first. If that fails it falls back to taking two words as a first and last name and matching them against the Sim info manager, lowercased on both sides, so capitalisation does not matter. That is the SimInfoParam class in server_commands/argument_helpers, in its _get_sim_id and get_arg_count_and_value methods.

Worked examples

The names below are placeholders. Substitute the two Sims you want to change.

Sim IDs are the reliable form when a Sim has an awkward name, a duplicate name, or no last name. sims.get_sim_id_by_name prints one, and its output line is {} has sim id: {}.

The amount adds, it does not set

The command body calls add_relationship_score on the first Sim's relationship tracker with your number as the increment. So the amount is a delta applied to whatever is there now.

The write is then clamped to the track's own tuned minimum and maximum. A large positive number therefore fills the bar rather than pushing it past the end, which is why 100 is the number everyone uses and why typing 5000 changes nothing that 100 would not have. The extraction records the base friendship and romance tracks as running from -100 to 100.

Track names, and which of them this page can prove

track_type is resolved through the STATISTIC instance manager, so it wants a track's tuning name.

The friendship name comes out of a comment Maxis wrote for the household template tuning: it describes a friendship bit whose triggered track is LTR_Friendship_Main. That is the game describing its own track, which is as close to first-party as a name gets short of the tuning files themselves.

The romance name is not in the extracted Python. What is there is the class that holds both references, RelationshipTrack, which carries a FRIENDSHIP_TRACK and a ROMANCE_TRACK tunable in relationships/relationship_track. So a romance track certainly exists and the command certainly accepts it; the exact string above is what the community uses, and this page labels it rather than stamping it.

Let the game tell you the track name

track_type goes through get_tunable_instance, which tries your word as an id, then matches it against the tuning names of every loaded statistic. That match is not exact unless the command asks for exact matching, and modifyrelationship does not ask.

So a fragment resolves when exactly one name contains it. When several do, the helper answers Multiple names matched '{}': {} and lists them sorted. That makes a fragment like Friendship worth typing on purpose: the error prints the real names back at you.

Three families of track, and only one of them is shared

RelationshipTrackType has exactly three members: RELATIONSHIP, SENTIMENT and UNIDIRECTIONAL.

Friendship and romance are RELATIONSHIP tracks. SimRelationship.get_track_relationship_data routes only sentiments and unidirectional tracks to per-Sim storage; everything else falls through to the shared bidirectional record. One write changes both directions.

That is why the advice to run the command a second time with the names swapped is wasted typing. The second run adds to the same number the first run already changed. Sentiments and attraction are the genuine per-Sim case, where each direction is its own value.

When the command runs and nothing happens

In order of how often it is the cause.

1. Cheats were never enabled this session. modifyrelationship is declared cheat type, so it is refused until testingcheats true has been entered. The flag clears every time you go back to the main menu or load another save.
2. One of the Sims is held at minimum detail. RelationshipService._can_create_relationship returns False if either Sim's level of detail is MINIMUM, and every path that creates a relationship goes through it. The write is dropped silently. SimInfoLODLevel runs MINIMUM, BACKGROUND, BASE, INTERACTED, FULL, ACTIVE, and unmet background Sims sit at the bottom of it.
3. The name did not match. Two words are consumed for a name whether or not they are the right two, so a Sim with a three-word name or an unexpected space throws the rest of the arguments out of alignment. The ID form avoids it.
4. The track name is wrong. This one is not silent. The tuning lookup answers with No names matched, or lists the candidates when a fragment matches more than one, so read the console rather than assuming.

The other four cheats worth typing

These are the remaining commands in this section declared as cheat type, with what the shipped code does rather than what their names suggest.

Note the third one. relationships.create_friends_for_sim is widely listed as a way to make friends for a Sim; the body submits a Sim filter and spawns the matches. New Sims appear. That is a different outcome from the one the name implies.

All 76 relationship commands in build 1.126.73.1030

Sortable. The column that matters is Works in retail: 36 of the 76 rows are reachable by a player. The rest are registered, and every cheat list on the web transcribes them, but a player cannot run them.

The four types break down as 5 cheat, 31 live, 14 automation and 26 debug. Cheat commands run once testingcheats true is on. Live commands are always callable, but they are the calls the game's own panels make: the matchmaking, genealogy and family-tree rows take Sim IDs, profile IDs and relationship-bit GUIDs, so they are reference rather than something to paste. Automation commands are driven through the QA channel. Debug commands never reach the registration call in a shipped build, so typing one does nothing at all.

No registration in this build ships a description string, so a filled cell in that column is our own sentence, written from the code the command calls, and a dash means we have not established the behaviour. A dash under Pack means the registration declares no pack code; EP16 where it appears is the code the file itself carries, not a pack name this page has independently confirmed.

Enabling cheats, and what it costs

Open the console with Ctrl+Shift+C. That is the same combination on Mac: the Control key, not Command. Command+Shift+C is a macOS shortcut, so the game never sees it, and reaching for Command instead is a common reason a Mac player thinks cheats are broken.

On PlayStation and Xbox, EA documents the cheat box as opening when you hold all four shoulder buttons at once, and notes that a keyboard plugged into a console still uses Ctrl+Shift+C.

The cost is achievements. EA's cheat FAQ states that cheat codes requiring testingcheats true disable achievements and trophies in the save being played, with build mode cheats as the exception and other saves unaffected.

If you would rather drag a relationship bar than type a six-word command, ui cheat sims 4 covers the mod route. Needs and moods are how to kill a sim on the sims 4, and editing the Sim itself is sims 4 cas.