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Survivalist: Invisible Strain
It's ten years since the infection started. Long-established settlements are collapsing, one by one, for unknown reasons. Survivors are running to the hills to escape, hoping for safety in remote places. As another refugee, you're here to carve out a new life for yourself - by any means necessary.
What players say
Steam review score and the most-helpful voices, which may include critical ones. Score via Steam as of 2026-09-02 · quoted reviews as of 2026-05-13.
What reviewers agree on
56 of the 102 reviews raise this.
“One of my favourite zombie games by far. Not only is it a good mix of State of Decay, Project Zomboid, and Kenshi, I find it very unique and the lore around the different strains (especially Invisible Strain) and Fema…”
“Its like kenshi and state of decay had a baby”
“This game deserves its flowers for giving State of Decay fans an outlet until State of Decay 3 releases (if it does). This game does everything right. Areas of improvement: Fully rendered interiors in buildings, and…”
8 of the 102 reviews raise this.
“Only people who genuinely suck this game are the same ones who can't appreciate that this game is both 12$ (worth so, so much more) and requires time to input brain cells to overcome the learning curve and plethora of…”
“Its kind of having a little bit of everything from Project Zomboid, State of Decay, and Vein. It's both easy (-er than other 3 that i've mentioned) and also hard in some aspects for example, NPC of non-community member…”
“A bit Dissapointed in the early play due to different expectation after coming from survivalist (the first and OG game) But I get around after that. 1, There is new mechanic like melee and sneaking which is absolutely…”
6 of the 102 reviews raise this.
“This is one of the best games I've ever played. I LOVE the gameplay and it having a sandbox mode with soo much replayability and freedom. I haven't even started playing the story mode yet and yet I am extremely…”
“Systems based zombie game in the 3rd person. Very detailed, but clunky. I had a ton of fun with it and will likely play it again in the future.”
“ngl.... this is a perfect time killer, you start alone or add hundreds of mods.... the console is there to use at will wich is neat for someone that just wants to mess about. You can become a warlord and recruit other…”
5 of the 102 reviews raise this.
“Well, what is it? It has interesting style of graphics. Might scare someone at start, cause "from far" it might look a little retro raster imaging or even little pixelated (that first Borderlands or The Walking dead…”
4 of the 102 reviews raise this.
“One of my favourite zombie games by far. Not only is it a good mix of State of Decay, Project Zomboid, and Kenshi, I find it very unique and the lore around the different strains (especially Invisible Strain) and Fema…”
“For a single developer, the amount of depth and replayablility this game has is outstanding! Story and sandbox mode are both amazing!”
“The best zombie survival game hands down. This game should be called The Walking Dead official game. You start alone, then meet someone, develop some relationship, build community, fight Negan, and then die. I cant stop…”
16 of the 102 reviews raise this · 6 of them still recommend the game.
“the doing of stuff is good the gameplay is fun but fuuuuuuuuuuuuucc me the priorety system is ♥♥♥♥♥♥♥♥ the menuing is ♥♥♥♥♥♥♥ the defualt controls are also ♥♥♥♥♥♥♥ somehow everything is backwards at every point and…”
“Honestly, I played the first game when I was a kid on the 360 Indie store, and it was honestly one of the best you could find on there. I 100%'d this on console, but I just can't appreciate it when I know the first game…”
“Game plays very little like State of Decay, Kenshi or Zomboid. Was excited to find this but the game is super janky (and coming from Kenshi and Zomboid that is saying a lot). The first 10 minutes of story mode explain…”
15 of the 102 reviews raise this · 8 of them still recommend the game.
“Only people who genuinely suck this game are the same ones who can't appreciate that this game is both 12$ (worth so, so much more) and requires time to input brain cells to overcome the learning curve and plethora of…”
“the doing of stuff is good the gameplay is fun but fuuuuuuuuuuuuucc me the priorety system is ♥♥♥♥♥♥♥♥ the menuing is ♥♥♥♥♥♥♥ the defualt controls are also ♥♥♥♥♥♥♥ somehow everything is backwards at every point and…”
“Game plays very little like State of Decay, Kenshi or Zomboid. Was excited to find this but the game is super janky (and coming from Kenshi and Zomboid that is saying a lot). The first 10 minutes of story mode explain…”
7 of the 102 reviews raise this · 4 of them still recommend the game.
“the doing of stuff is good the gameplay is fun but fuuuuuuuuuuuuucc me the priorety system is ♥♥♥♥♥♥♥♥ the menuing is ♥♥♥♥♥♥♥ the defualt controls are also ♥♥♥♥♥♥♥ somehow everything is backwards at every point and…”
“Too many functionalities that aren't explained. For example, how do i manage my food? I've planted seeds, but there is no guide on how to fulfil a camps food requirements. I heard you can make rabbit traps, but no guide…”
“Saw a group of looters were coming so I geared 3 followers up with melee weapons and took a shotgun. I shot one of their guys with a shotgun (which he tanked of course) and his 3 guys proceeded to immediately drop me…”
6 of the 102 reviews raise this · 6 of them still recommend the game.
“Its kind of having a little bit of everything from Project Zomboid, State of Decay, and Vein. It's both easy (-er than other 3 that i've mentioned) and also hard in some aspects for example, NPC of non-community member…”
“Very immersive game. I find the story mode a bit hard for starters, not from the survival aspect in the beginning but the games pushes you with escalating raids with guns and stuff too soon. I think the gun raids start…”
“I played a little on story mode and found that a bit boring and linear. But it is probably one of the best zombie game if played in the sandbox. Vanilla is a bit off balanced but mods are editors are awseome and they…”
4 of the 102 reviews raise this · 3 of them still recommend the game.
“Honestly, I played the first game when I was a kid on the 360 Indie store, and it was honestly one of the best you could find on there. I 100%'d this on console, but I just can't appreciate it when I know the first game…”
“I played a little on story mode and found that a bit boring and linear. But it is probably one of the best zombie game if played in the sandbox. Vanilla is a bit off balanced but mods are editors are awseome and they…”
Counted across 102 English reviews, sampled to match this game's 86.7% positive rating · as of 2026-05-13
“Oh boy, what fun 3 weeks! What I did: - Started from nothing and found a nice hill to build my shack and campfire. - Recruited passing refugees, sending them off to the unexplored, dangerous wasteland if they sucked at their job or if they looked at me funny. - Interrogating my…”
— a player, Steam review · 303 hrs played“I’ve sunk hundreds of hours into every zombie survival game under the sun, from AAA to the janky. Survivalist Invisible Strain is one of the rare ones that gets things right. It’s super indie, has a ton of heart. The art style looks like someone ripped pages straight out of a…”
— a player, Steam review · 237 hrs played“I got introduced to this game by a random youtube video on someones sandbox playthrough and i can say i really like this game. pushing aside any bugs and issues because every game is going to have one regardless of there age and size but this game runs really stable and i've…”
— a player, Steam review · 224 hrs playedPlayer activity
Monthly average concurrent players. Live data self-collected from the Steam API · history through 2026-06 via SteamCharts.
Achievement stats
Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-09-05.
Price tracking
US-region pricing (USD), sampled twice daily by our own tracker since 2026-07-11. Steam prices vary by region — always confirm your local price on Steam.
Regional prices at last sample, in local currency — Steam sets each region's price independently.
Cheapest → most expensive, converted to USD at ECB reference rates (2026-09-10). Relative comparison only.
Latest official news
Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.
Kicked v285 (the latest build, with pickpocketing) onto the main branch!
Hello, just a note to say I've updated the main branch with the latest build in publicbeta, which means Pickpocketing is now fully released to everyone :) trading cards ! [img src="
New small patch in publicbeta (v284)
Hello, it's just another small patch in publicbeta. This is mainly to fix a crash when you try pickpocketing someone but your character is too moral or likes them too much to want to hurt them, which
New small patch in publicbeta (v283)
Hello, just a small publicbeta update with a fix for an occasional crash if something gets deleted while you are repairing it, and a fix for the SIS Move Props mod, which it seems got broken by a chan
New patch in publicbeta with pickpocketing (v279), last patch in main (v278)
Hello everyone, got kind of a bigger patch for you today as I've added pickpocketing and TAA (Temporal Anti-aliasing). The TAA is on a checkbox in the Settings/Graphics menu, it makes the black outlin
New small patch in publicbeta (v278)
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
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Screenshots
Official Steam store screenshots — click any shot to enlarge.
Facts & details
From the Steam store record, snapshot 2026-05-13.
| Genres | Action, Adventure, Indie, RPG, Simulation, Strategy |
| Player tags | Open World Survival Craft · Colony Sim · RPG · RTS · Action · Third Person · Base-Building · Post-apocalyptic · Character Customization · Choices Matter · Conversation · Open World (SteamSpy community voting) |
| Features | Single-player · Multi-player · Co-op · Online Co-op · Steam Achievements · Steam Trading Cards · Steam Workshop · Partial Controller Support |
| Languages | English, Japanese, Korean, Simplified Chinese, Italian, Hungarian, Turkish, French, Spanish - Latin America, Lithuanian, Russian, Spanish - Spain, Portuguese - Brazil, German, Czech, Vietnamese, Indonesian, Ukrainian |
| Achievements | 33 |
| Official site | https://www.ginormocorp.com/ |
Minimum system requirements (PC)
Minimum: Requires a 64-bit processor and operating system OS: Windows 10 or higher Processor: 2.0 GHz Intel quad-core and above (Subject to change) Memory: 4 GB RAM Graphics: NVIDIA GTX 660m or equivalent (Subject to change) DirectX: Version 10 Storage: 3 GB available space Additional Notes: Download the free demo to find out how well your PC can run it!