Survivalist: Invisible Strain — patch notes and updates
Stored observation / content update:
Dated developer announcements recorded from Steam. Open the source for the complete update.
| Update | Date | Excerpt / source |
|---|---|---|
| New small patch in publicbeta (v278) | 2026-05-09 | Hello I've released a new small patch in publicbeta, mainly because I discovered the last one broke a couple of important things. Fortunately they didn't make it into the main branch, so this is just a publicbeta update.Added settings for loot generation to spawn biohazard cocktails with infection (for modders)Minor fixes for options on action menu for loading different ammo types in guns/bowsFix for Morgan Harding not triggering the It Begins quest if the player community leader is dead (and possible related crash fix)Fix for game staying paused if you open info screen while in combat, potentially leading to soft lock at start of Story ModeF |
| One year anniversary, new publicbeta patch and translations in main branch | 2026-04-27 | Hello, Survivalist: Invisible Strain has been out of early access for one year! Well actually that was two days ago. Anyway, seems like a good time for a sale, so Survivalist: Invisible Strain is participating in the Post Apocalyptic Festival on Steam from April 27th to May 4th, with a 50% discount! This festival was instigated by Red Rover Interactive the developers of the upcoming EngineFall, and includes some awesome games like Pacific Drive.There's also a new patch in publicbeta today, v277. I'm working on a new unannounced project these days but I'm still doing bug fixes, translation work where needed, and some gameplay tweaks on Invisib |
| New small patch in publicbeta (v276) | 2026-04-15 | Hello, I've released another small update in the publicbeta branch. This contains some fixes and support for mods, and translator support. Also a slight tweak to combat; previously if you kept swinging your melee weapon at a zombie without being close enough to engage, they would back off, and you could in theory keep doing that forever - now after a few seconds of that they'll just attack no matter what.Fix for crash in SIS Extended: Adaptive CombatFix for Out Of Sync errors in multiplayer if one player has previously run SIS Ageing without restarting the game since, and the other hasn'tFixes for some errors in speech parameters, and added s |
| New patch in publicbeta (v275) | 2026-04-05 | Hello, there's a new patch in the publicbeta branch. It has a few small fixes for mods and translations, but the main change is that the Russian translation has been greatly improved by Pavel Borisov, who also did the Cyrillic fonts - many thanks for that! Here's the change list:Fix for Carter Moreno shooting you if you wait for 1 minute before replying in the Vanished questFix for error loading DLL for RV modFix for mods with multiple DLLs failing to load the remaining ones if one of them fails (SIS Extended: Standalone)Fix for crash when using the editor with SIS Pick BerriesFix for possessive form of names sometimes inserting a character i |
| New patch in publicbeta (v274), previous patch in main branch (v272) | 2026-03-24 | Hello, I've released a new patch in the publicbeta branch. This one has quite a few bug fixes, plus the Story Mode translations for both Indonesian and Ukrainian have now been completed!Here's the full change list:Fix for one NPC in a group of 4 followers constantly exiting the building you are in, when surrounded by zombiesFix for steroids in the fetch quest not appearing on an NPC's trade screen if they are hungryFix for preferences being saved whenever you enter the graphics settings menu even if you didn't change anything, which might have caused some weirdness (not sure)Fix for names sometimes being empty in speeches on Log pageFix for e |
| New small patch in publicbeta (v272), previous patch in main branch (v271) | 2026-02-24 | Hello everyone, I've released a small patch in the publicbeta branch, mainly because someone found an occasional crash involving infected stew in cooking pots. Here's the change list:Fixes for some situations where cooks and crafters would get stuck in a repeating loop of taking and depositing itemsFix for 'Help the Wishkey Falls Militia survive the incoming bands of infected raiders' quest not finishing until the raiders bodies disappearFix for occasional crash when highlighting a cooking pot over a campfire with infected stew in itWhen you give stuff to people for free the penalty to respect will be less if they are your allies, but more if |
| Vietnamese translation in main branch! + new small patch in publicbeta (v271) | 2026-02-03 | Hey everyone, the patch with the Vietnamese translation is now available on the main branch (v270)! Thanks again to Trần Quốc Anh for the translation.There's also a new small patch (v271) in the publicbeta branch with some bug fixes:Fix for Auto Gear Up mod sometimes causing a crash on starting a new game if you start with a gunFix for some cases where items are picked up as part of roles sometimes not being marked as such and therefore not given priority to dump when freeing up spaceFix for being able to place workbenches, forges etc facing a building or rock so there's nowhere to stand while craftingFix for crafter assigned to workbench/for |
| New patch in publicbeta with Vietnamese translation! (v269) | 2026-01-14 | Hello, I've released a patch into the publicbeta branch with a brand new complete Vietnamese translation! Many thanks to Trần Quốc Anh for doing that!Here is the change list:Added Vietnamese translation!Updated Brazilian Portuguese, Czech, Italian, Japanese, Latin American Spanish, Spanish and Traditional Chinese translationsFix for achievements not being unlocked on XBox if you have a child account or something without access to multiplayerThe previous patch, v268, is now in the main branch and on XBox.EDIT - I've released a hotfix for a copy paste error in the Vietnamese translation for the Story Mode and Sandbox Mode descriptions when you |
| New patch in publicbeta (v267) | 2025-12-08 | Hello everyone, it's time for a patch! The main thing in this one is I've added an option to the Online Co-op Settings menu called "Network Protocol". This is a bit of an experiment. The game uses the Steamworks API for networking, but Valve has made some changes since I originally implemented it and the version I've been using is apparently old and maybe due to be deprecated some day. So this option allows you to switch to their newer system. It's just a test for now to see if there are any bugs, but perhaps in future it will become the default.I'm not sure if it will actually make a difference to the user experience but Valve have built som |
| Steam Awards & Trading Cards! | 2025-11-25 | Hey everyone, it's Steam Awards time so please consider voting for Survivalist: Invisible Strain! I figured I'd go for "Best Game You Suck At" in honor of all the feedback I got this year saying I made Story Mode too difficult (oops, sorry about that). You've got till 1st December to vote, so don't sleep on it! ːSleepingZzzːPlus, the game now has Steam trading cards! (And badges, emoticons ːInfectedSignː and backgrounds).These were created by artist and fan Ramiro Ra, who also did some of the Spanish translation, so many thanks for that! ːZombieThumbUpː It'll drop a trading card every 2 hours of play time which you can use to craft badges and |
| Czech translation in main branch and some new fixes in publicbeta! (v266) | 2025-11-13 | Hello, got a patch for you today! The Czech translation, completed in v265, is now out of beta testing and into the main branch! Many thanks to Jiří Linhart for that.Plus there's a new patch in publicbeta, v266, with some bug fixes:Possible out of sync fixFix for crash when a character activates Invisible Strain when you are using mods with their own AI behaviours such as SIS Livestock ControlFix for world maps and geological maps not correctly displaying what area of the world they uncover when playing on a Huge (2km squared) game mapFix for NPCs sometimes getting stuck aiming their bows at enemies but not firing because they are too tired, |
| German translation in main branch, and Czech completed in beta (v265)! | 2025-10-26 | Hey everyone, I've updated the main branch to v264, which has the completed German translation in it, and there's now a new patch in the publicbeta branch with the completed Czech translation!Here's the full change list for v265:Completed Czech translation!Updated Brazilian Portuguese, Japanese and Latin American Spanish translationsStop people from tearing up their clothes to bandage friends in the middle of combat as it takes too long and makes them vulnerableFix for trappers who are set to auto-deposit wood sometimes getting stuck in a loop taking it and depositing itFix error saying You need to remove cooked food when trying to cook somet |
| New patch in publicbeta with German translation finished! (v264) | 2025-10-16 | Hello everyone, there's a new patch in publicbeta which finally finishes the German translation! There has been a partial German translation of Sandbox Mode and the UI for a few years, but this fills in the gaps and adds Story Mode.Here's the full change list:Completed German translation!Updated Brazilian Portuguese, Czech and Japanese translationsReduced volume of car crash sound slightly and fixed bug where engine noise keeps playing while pause menu is upSome fixes for bugs when ticking, subscribing and unsubscribing to mods in quick succession in the Select Mods screenFix for enclosed areas not being recalculated after you build a gateFix |
| New patch in publicbeta (v263), previous patch moved to main branch (v262) | 2025-10-04 | Hello everyone, there's a new patch in the publicbeta branch! One small new feature in this one, for people using gamepads, who previously never had a convenient way to quicksave: now you can do it by opening the pause menu and pressing the alt action button (e.g. X on the XBox controller). So it's a fairly quick two button presses instead of having to go into the Save Game menu. If you're playing with save tokens enabled, it'll show how many of them you have left too, so it's convenient in that way.Here's the full change list:Added quicksave prompt mapped to alt action (e.g. X button on XBox controller) to pause menu for people playing on ga |
| New small patch in publicbeta (v262), previous patch moved to main (v261) | 2025-09-21 | Hey everyone, I've released a new small patch today, mainly because someone had a bug in Story Mode that stopped them progressing with some of the plot. There's also a slight improvement to vaulting - if you're vaulting a long line of fences (such as the ones around the gas station in Story Mode), you can turn right or left to get off instead of having to watch your character do this goofy vaulting animation all the way to the end of it with no way to stop it.Here's the change list:If you are vaulting a long line of fences you can turn sideways to cancel it, as long as there's nothing blocking youFix for surrender to FEMA quest triggering lat |
| New patch in publicbeta (v261), previous patch in main (v260) | 2025-09-16 | Hello, I've got a patch with a few more bug fixes for you today:Added ability for modders to vary reload speed of weapons according skillFix for being able to unbind critical menu navigation buttonsFix for crash in SIS Clean Trash modFix for error on XBox when saving very large savegamesFix for pressing Back button on gamepad backing out of menus when you have a drop-down open instead of closing the drop-downFix for Charlie Gant not correctly triggering something as part of his quest if he isn't in your community at the timeFix for rare bug where Liam Franks attacks you at a weird time if he happened to notice some property damage you caused |
| New patch in publicbeta (v260), previous patch in main (v259) | 2025-08-28 | Hello, I've released a new patch today, it's a fairly small one with some bug fixes and a little quality of life improvement (I hope) - the overhead player name of the character you're controlling in multiplayer fades out a few seconds after you switch to that character, so it doesn't get in the way so much. This was something a few people requested.Also I added a sort of faded old paper texture to the menus, it doesn't change anything I just think it looks a bit better. Just a small thing I wanted to do earlier but I was too busy making the game :)Here's the full change list:Fade out overhead player name of controlled character in multiplaye |
| New mini patch in publicbeta (v259) | 2025-08-15 | Hello, just a quick publicbeta patch today because the last one caused a mod to crash. This also has a fix for a longstanding bug in multiplayer where characters would occasionally stop animating for a few seconds. Always struggled to track that one down due to its intermittent nature but I'm pretty sure it's fixed now. Here's the changelist:Fix for crash in SIS Extended: Effects Framework modPossible crash fixPossible fix for character animations occasionally freezing for a few seconds in multiplayerUpdated Brazilian Portuguese, Czech and Japanese translationsWhat's this publicbeta thing?v259 will be in the "publicbeta" branch on Steam for a |
| New patch in publicbeta (v257), previous patch moved to main branch (v256) | 2025-08-11 | Hey everyone it's patch day! This patch is mainly about trying to address the biggest problem I've heard about since the game launched - that it doesn't teach you enough about how to play, especially in Story Mode. Since launch I've watched a number of playthrough videos and read comments and I made a little list of things that went wrong or caused confusion, and this patch I've been going through the list and fixing all the things, and adding a bit more explanation of stuff people didn't know how to do. I was doing some of that in the previous patches too but this patch I've taken it a bit further and broken my rule about not adding new text |
| New patch in publicbeta (v256), previous patch in main branch (v254) | 2025-07-20 | Yo, it's patch day! Mostly bug and exploit fixes again but one small new feature - you can use the Set Policy dialog for ranged weapons as well as their ammo. So if you want people to automatically collect bows or pistols from corpses, you can do that now :) I always kind of didn't want to do that because I was worried about having too many menu options, making the UI look cluttered and confusing for new players. But I found it was something people asked for a lot, and it's not a huge change, so I figured maybe I was just overthinking that a bit too much.Also I've slowed down the rate at which crops die from frost. I think I actually should h |