sp-tarkov/build 4.0.1

SPT 4.0.1 (40087)

on GitHub

Requires EFT 0.16.9-40087 (released 12th September 2025)

You NEED the .NET 9 runtimes:

• https://dotnet.microsoft.com/en-us/download/dotnet/thank-you/runtime-9.0.9-windows-x64-installer
• https://dotnet.microsoft.com/en-us/download/dotnet/thank-you/runtime-aspnetcore-9.0.9-windows-x64-installer

Release notes

• The first post-4.0.0 release. We focused on bugs reported by players and issues found by modders creating/updating their mods.

Automatic install instructions

This is the recommended way to install SPT
https://forge.sp-tarkov.com/installer

Mod compatibility

• Compatible with 99% of mods made for 4.0.0
• Incompatible with ALL mods not made for 4.0.x

Profile compatibility

• Compatible with 4.0.0 profiles
• Incompatible with 3.11.0 profiles and older
• 3.11.3 and 3.11.4 profiles with no custom items/traders/total conversions should work

Manual install instructions (Optional)

https://github.com/sp-tarkov/build/wiki/Manual-Install-Instructions

Upgrading from 4.0.0

• Download 7z file from the "Direct Download" section below and extract its contents into your existing 4.0.0 install folder. Overwrite all

Changes

ADDED

• Added additional PMC names
• Added BotConfig.ReplaceScavWith to allow adjustment of scavs into other bot types across all maps
• Show warning message when running multiple servers at the same time

MODIFIED

• Adjusted weather: Clouds will be thicker when raining, sunny periods have slightly higher chance for fog
• Removed Tagilla from PMC brain pool - caused them to stand still forever
• Updated launcher Chinese locales
• Updated customs bossKnight spawn chance from 0 to 18%
• Updated max number of stash upgrades that can be used to match live
• Flea will now show Unlock at level x instead of offer creators name in while item is tier locked
• Blacklisted unlootable PMC Origins figurine from PMCs
• Blacklisted Corpse room key and Rusted bloody key from rewards (e.g. Fence)
• Improved API call response time

FIXED

• Fixed Launcher not showing installed mods
• Fixed PMCs not spawning on PMC raid when player disables bosses in pre-raid screen
• Fixed PMCs not always spawning in scav raids
• Fixed inspecting a required for upgrade item in hideout causing server error
• Fixed index out of range on probability object array error
• Fixed issue where profiles can become corrupted when server is stopped while saving data
• Fixed PointsEarnedDuringSession overflow error on raid end caused by players setting XP gain to absurdly high values in SVM
• Fixed Commando bot inheriting all chat commands from other chat bots
• Fixed tiered flea issue. A low level profile can lock items for all other profiles until server restart
• Fixed PMC stats not being persisted during prestige
• Fixed possible null reference inside GetItemMinAvgMaxFleaPriceValues when GetOffersOfType returns no value
• Fixed bundles not loading correctly
• Fixed profile migration system error affecting USEC profiles

MODDERS

• Cleaned up comments and var usage inside UpdateQuestsForGameEdition
• BaseInteractionRequestData.ToOwner.Id is now a string
• BaseInteractionRequestData.FromOwner.Id is now a string
• Allowed bypass of SetConsoleOutputMode via DISABLE_VIRTUAL_TERMINAL env variable
• Downgraded various warning messages in modules to info or debug
• Disabled UnmappedMemberHandling on release builds
• Flagged BotLocationModifier.AdditionalHostilitySettings as nullable
• Updated non-active maps base.json data
• Discard duplicate item locale entry instead of throwing an exception when using CustomItemService

Known SPT issues

https://github.com/sp-tarkov/build/wiki/Known-SPT-issues

Known NON-SPT issues

https://github.com/sp-tarkov/build/wiki/Known-non-SPT-issues

Direct Download

https://spt-releases.modd.in/SPT-4.0.1-40087-1eacf0f.7z

Thanks

DrakiaXYZ
Lacyway
Refringe
ArchangelWTF
CWX
CJ-SPT
cp89gamedev
clodanSPT
qingchunnh

Everyone in #be-testing who gave up their free time to find and report issues