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Event[0]

Event[0]

Event[0] is a sci-fi narrative exploration game where you build a relationship with a lonely spaceship computer to get home to Earth.

Released Sep 14, 2016 Developer Ocelot Society Publisher Ocelot Society, Tohu Bohu Games Platforms Windows · Mac AdventureSci-fiAtmosphericSpaceIndie
View on Steam ↗ $19.99 (US · as of 2026-10-24)

What players say

Steam review score and the most-helpful voices, which may include critical ones. Score via Steam as of 2026-09-27 · quoted reviews as of 2026-10-16.

80.4%positive2,297 reviews
Recommended · 120 found this helpful

“Event[0]. Hey Judy, hey... Introduction Event[0] is a simple first-person mystery game set in space. It features an artificial intelligence by the name of Kaizen-85, who you can chat with freely about anything that it understands. Kaizen is Event[0]'s main selling point too, due…”

— a player, Steam review · 4 hrs played
Recommended · 78 found this helpful

“An interesting and simplistic game, with a few puzzles that require some common sense and logical thinking. The main premise of the game is that you are trapped on a derelict space station with nothing but the help of the Space Station's artificial intelligence to gain your…”

— a player, Steam review · 5 hrs played
Not recommended · 134 found this helpful

“Driven by your interactions with a chatbot, Event[0] is definitely a game I would consider to be unique and it's what attracted me to it in the first place. The game begins with a slow and kind of annoying intro that gives the player a set of answers and responses to choose from…”

— a player, Steam review · 5 hrs played
Read more reviews ↗

Player activity

Monthly average concurrent players. Live data self-collected from the Steam API · history through 2023-01 via SteamCharts.

395all-time peak
0 50 100 2017 2019 2021 2023 2025 No data collected for this period No data collected for this period 59 avg · Apr 2017

Achievement stats

Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-10-24.

12achievements
31.1%median completion
3.9%rarest: Things Are Things
78.7% of players 62.8% of players 54.5% of players 48.8% of players 44.5% of players 31.1% of players 31.1% of players 17.3% of players 13.7% of players 11.5% of players 3.9% of players 3.9% of players 78.7% 0% most earned rarest
Almost everyone has
78.7%First Contact — Hidden achievement
62.8%A Wrong Place At A Wrong Time — Hidden achievement
54.5%Shall We Play a Game? — You did small talk with Kaizen.
Rarest badges of honor
3.9%Things Are Things — You found all the hidden commlink logs.
3.9%Learn Everything About Everything — You opened all the logs of the Nautilus.
11.5%The Nautilus Is Yours — You reached the "The Nautilus Is Yours" ending.

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.

$19.99current · sampled 2026-10-24 11:05 UTC
$4.99lowest since tracking began2026-09-21
US19.99 USD
EU19.99 EUR
UK14.99 GBP
Australia28.95 AUD
Canada21.99 CAD
Japan1,980 JPY
Brazil36.99 BRL
China68.00 CNY

Regional prices at last sample, in local currency — Steam sets each region's price independently.

Brazil≈$7.3 China Japan Canada US UK Australia EU≈$22

Cheapest → most expensive, converted to USD at ECB reference rates (2026-10-23). Relative comparison only.

$0 $25 $50 07-11 07-30 08-20 09-10 10-01 10-24

Latest official news

Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.

Sep 21, 2026
Ten-year anniversary stream with the former team tonight at 7pm CEST 🎂

Hi, It's been a while, right? Ten years exactly. To celebrate this decade of weird answers by Kaizen, we will stream the game with the former team tonight at 7pm CEST. Expect anecdotes, gift and live

Jan 10, 2017
Some good news...

Happy new year, astronauts! We wish you the best for this new year, and let’s start with good news. First of all, the MacOS version is fixed, which means you won’t have an infinite loading anymore if

Jan 10, 2017
Some good news...

Happy new year, astronauts! We wish you the best for this new year, and let’s start with good news. First of all, the MacOS version is fixed, which means you won’t have an infinite loading anymore if

Nov 23, 2016
Patch Note 11/23/2016

* Optimized memory allocations * Fixed several light shafts * Improved Earth shaders * Removed the angry Kaizen face in the Bridge * Taught some vocabulary to Kaizen * Improved logs with new data * Ad

Nov 23, 2016
Patch Note 11/23/2016

* Optimized memory allocations * Fixed several light shafts * Improved Earth shaders * Removed the angry Kaizen face in the Bridge * Taught some vocabulary to Kaizen * Improved logs with new data * Ad

Games like Event[0]

From our knowledge graph — ranked by shared traits, not a black box. Each card says why it's here.

The Stanley Parable The Stanley Parable 92.3% · 32,065 reviews shares Dynamic Narration, Short, Narration, Multiple Endings The Turing Test The Turing Test 86.9% · 5,509 reviews shares Artificial Intelligence, Short, Space, Mystery Observation Observation 78.6% · 2,785 reviews shares Artificial Intelligence, Short, Space, Mystery The Stanley Parable: Ultra Deluxe The Stanley Parable: Ultra Deluxe 94.2% · 24,885 reviews shares Narration, Multiple Endings, Choices Matter, Mystery What Remains of Edith Finch What Remains of Edith Finch 94.3% · 19,250 reviews shares Short, Narration, Mystery, Horror Dear Esther: Landmark Edition Dear Esther: Landmark Edition 70.7% · 3,710 reviews shares Short, Narration, Mystery, Horror [Chilla's Art] The Convenience Store | 夜勤事件 [Chilla's Art] The Convenience Store | 夜勤事件 83.7% · 1,931 reviews shares Short, Narration, Mystery, Horror HOME HOME 89.5% · 1,375 reviews shares Short, Multiple Endings, Choices Matter, Mystery

Screenshots

Official Steam store screenshots — click any shot to enlarge.

Facts & details

From the Steam store record, snapshot 2026-05-12.

GenresAdventure, Indie
Player tagsAdventure · Sci-fi · Atmospheric · Space · Indie · Singleplayer · Mystery · First-Person · Choices Matter · Multiple Endings · Artificial Intelligence · Story Rich (SteamSpy community voting)
FeaturesSingle-player · Steam Achievements · Steam Trading Cards · Steam Cloud · Family Sharing
LanguagesEnglish * , French *
Achievements12
Official sitehttps://tohubohu.games/
Minimum system requirements (PC)

Minimum: OS *: Windows 7 or higher, 64bits Processor: Intel i5 2.4Ghz Memory: 8 GB RAM Graphics: Nvidia GeForce GTX 650 Storage: 10 GB available space