What does this mod actually do?

The Sims 4 already gives you three normal speeds, but when you reach Speed 3, that is usually where it stops. Sometimes, though, you just want things to move a little faster: waiting for a Sim to finish sleeping, getting through a long workday, or simply moving through the quieter parts of a save without having to sit there and wait.

Instead of replacing the game's normal speed controls, my script turns the existing Speed 3 button into a three-stage cycle:

7x → 14x → 21x

The first press gives you the normal EA Ultra Speed you already know. Press it again and you get 14x speed. Press it a third time and the game moves to 21x.

Pressing the button again starts the cycle over.

What you should notice in-game

The main difference is simple: Speed 3 becomes much faster when you need it to be.

The first press works exactly as you would expect, giving you the standard EA Ultra Speed.

The second press moves up to 14x speed, which is twice the usual Speed 3 rate.

The third press moves to 21x speed, giving you a much more aggressive fast-forward option for situations where waiting around is the main thing slowing you down.

Your normal Speed 1 and Speed 2 behaviour remains unchanged.

There is also a higher 36x Super Speed used by the game for certain autonomous situations, such as when Sims are asleep or at work. That speed is separate from the three tiers you control manually.

The mod also resets itself to Tier 1 whenever you load a lot or travel to another zone. This is intentional: every new lot starts at the standard Ultra Speed rather than carrying an unexpectedly high speed setting with it.

How it works

The Sims 4 handles time progression through its own simulation and clock systems, so simply forcing the game to run at an arbitrary multiplier is not particularly safe.

My script works within the game's existing timing system and uses three controlled speed factors:

• Tier 1: 1.0x factor  (7x effective game speed)
• Tier 2: 2.0x factor (14x effective game speed)
• Tier 3: 3.0x factor (21x effective game speed)

The important part is that these values are deliberately capped rather than allowing the speed to increase indefinitely.

The script keeps the internal multiplier within the limits it is designed to work with, while the resulting clock speeds remain at 7x, 14x and 21x.

This is also designed to work alongside the game's simulation time budget rather than trying to completely bypass it.

Crash-safe design

I built this mod with stability in mind.

The speed values are deliberately limited to 7x, 14x and 21x, rather than allowing unrestricted multipliers that could push the simulation far beyond what the game can reasonably process.

The script also avoids unnecessary disk operations during normal use. Its logging uses the game's native sims4.log.Logger system and is designed to run without blocking the simulation every time the speed changes.

In practical terms, the goal is to make higher speeds feel fast without turning the speed system itself into another source of instability.

Speed tiers

In-game input	Tier	Effective speed	What it does
1		1x	Normal Speed
2		3x	Fast Speed
3 (first press)	Tier 1	7x	Standard EA Ultra Speed
3 (second press)	Tier 2	14x	Double Ultra Speed
3 (third press)	Tier 3	21x	Hyper Speed
Autonomous		36x	Super Speed used by the game in certain situations

The important distinction is that Tier 1 is not an additional boost beyond the vanilla game. It is simply the existing Speed 3 level, which then becomes the starting point for the two faster tiers.

Console commands

You can also control the speed directly from the cheat console.

Open it with Ctrl + Shift + C.

morespeed.cycle
lucien.morespeed.cycle

Cycles through Tier 1, Tier 2 and Tier 3.

morespeed.setboost <1-3>

Sets the tier directly.

For example:

morespeed.setboost 2

sets the game to 14x speed.

morespeed.reset

Returns the speed to Tier 1, or 7x.

morespeed.status

Displays the current clock speed, active tier factor and request counters.

Compatibility with the Simulation Overhaul

This mod is designed to work alongside my Simulation Overhaul, and the two scripts are fully compatible with each other.

They handle different parts of the game.

More Speed controls how quickly the game clock advances, giving you the 7x, 14x and 21x speed tiers.

The Simulation Overhaul deals with what the game is doing while that clock is running. It manages simulation time, prioritises important Sims, reduces unnecessary delays, helps recover from routing problems and watches for interactions that become stuck.

Because the two mods work at different levels, you can use them together without one replacing or interfering with the other.

In fact, they are designed to complement each other.

At higher speeds, the game has to process considerably more simulation work in a shorter amount of real time. The Simulation Overhaul is able to respond to that increased load by giving the simulator more room to catch up when necessary, while More Speed handles the faster clock itself.

This is especially useful with 14x and 21x speed, where the simulation can otherwise struggle to keep pace with the accelerated clock.

There is no need to choose between the two mods or install only one of them. You can simply place both .ts4script files in your Mods folder and let them work together.

The important thing is that you should not install other mods that perform the same functions, particularly older simulation-lag fixes, autonomy-delay overrides or alternative speed-control scripts that modify the same systems.

With both of my scripts installed, the intended setup is straightforward:

More Speed: controls how fast time moves.

Simulation Overhaul: helps the simulation keep up with that faster time.

Together, they are designed to make higher-speed gameplay both faster and more responsive, since I have wired handlers for higher speeds from this mod in the simulation overhaul system.