How do you install mods in Schedule 1?

Install the .NET 6 Desktop Runtime and the Visual C++ 2015–2019 redistributable, run the MelonLoader installer and point it at your Schedule I folder, launch the game once to create the Mods folder, then drop mod .dll files directly into \Schedule I\Mods\.

Why are my Schedule 1 mods not working?

The three usual causes are missing .NET 6 / VC++ prerequisites, a mod built for the wrong scripting backend (IL2CPP versus Mono), or the .dll being left in a subfolder instead of directly in the Mods folder. Check MelonLoader's latest.log for [ERROR] lines to see which mod failed.

Do Schedule 1 mods work in multiplayer?

It depends on the mod. Client-side mods like Minimap and FPS Boost only need installing by you. Mods that change gameplay state, such as Better Employees or StackItemPlus, must be installed by every player at the same version or the session desyncs.

How solid are these numbers?

All 34 effect multipliers, all 16 ingredient prices and the base product prices are cross-checked against the published Steam reference tables. The individual transformation rules are mostly not confirmed one by one yet, and meth/cocaine input costs are modelled. Checked against build v0.4.6f12 (Early Access) on 2026-08-11. Sources.

Schedule 1 Mods

MelonLoader setup start to finish, the backend mismatch that makes the game crash on launch, and which mods your co-op partners also need to install.

The mistake that breaks most installs: IL2CPP vs Mono

Schedule I ships two scripting backends and they are not interchangeable. IL2CPP is the default for Steam players and what most Nexus mods target. Mono is an opt-in beta branch with better error messages but lower performance. Load a mod built for the wrong one and MelonLoader crashes on startup. Check which you are on via Steam → right-click Schedule I → Properties → Betas, and only install matching builds (or ones marked [Both]).

Installing MelonLoader

Install the prerequisites first .NET 6 Desktop Runtime (x64) and the Microsoft Visual C++ 2015–2019 Redistributable (x64). Skipping these is the number one reason the MelonLoader console never appears.
Run the MelonLoader installer Get it from melonwiki.xyz. Point it at your Schedule I installation folder and let it finish.
Launch the game once A black console window opens alongside it — that is MelonLoader initialising, and it creates the Mods folder. Close the game once you have seen it.
Find the folder Steam Library → right-click Schedule I → Manage → Browse Local Files. The Mods folder is in the game directory.
Drop in the .dll files Directly into \Schedule I\Mods\ — not into a subfolder. On next launch the console window lists each mod as it loads.

Mods worth installing

The co-op column is the part people miss. Install a gameplay-state mod that your friends do not have and the session desyncs or refuses to connect.

Mod	Type	What it does	Co-op
ModsApp	QoL	In-game phone app for configuring your other mods instead of editing config files.	Both branches
Minimap	QoL	Overlay map with points of interest. F3 toggles it.	Client-side
StackItemPlus	QoL	Raises item stacks to 60 per slot.	All players
TrashGrabber PLUS	QoL	Removes the trash tool’s capacity limit.	Host only
Better Employees	Economy	Configurable worker speed, wages and routes.	All players
AutoRestockMono	Economy	Auto-fills storage and handles bank charges.	All players
AutoLaunder	Economy	Restarts laundering cycles automatically.	All players
FPS Boost	Performance	URP tuning plus FSR upscaling support.	Client-side
OverTheCounter	Content	Adds retail storefronts staffed by NPCs.	All players
MultiplayerPlus	Content	Raises the lobby cap from 4 players to 20.	Required by all

Start with ModsApp

It gives you an in-game phone interface for configuring every other mod, which beats hand-editing config files. A sane first install is ModsApp + Minimap + Better Employees.

Mods not working?

Symptom	Cause	Fix
No MelonLoader console window on launch	Missing .NET 6 or VC++ prerequisites	Install both from Microsoft, then reinstall MelonLoader.
Game crashes instantly on startup	A mod built for the wrong scripting backend	Check your Steam Betas tab, empty the Mods folder, reinstall the right build.
Mod downloaded but nothing happens	.dll left inside a subfolder	Move the file directly into \Schedule I\Mods\ — no nesting.
Worked before, broken after a patch	Mod not updated for the new game version	Check the mod page for an update; remove it if there is none yet.

When none of those fit, open \Schedule I\MelonLoader\Logs\latest.log and search for [ERROR]. The log names the mod that failed and why, which is far faster than removing mods one at a time.

Where to get mods

Nexus Mods — Schedule I — the main repository. Sign-in required to download.
MelonLoader (melonwiki.xyz) — the loader itself.

Console commands — much of what people install mods for is built in already.
Mix calculator — no install required.

Sources