About the game

Concepts are bombs. Association is death. An cult-like anti-utopian psychological horror puzzle game. The subject has a concept bomb implanted in brain. If a subject thinks of the [Fuse Word], their head detonates. You, as the "cognitive bomb defuser", dismantling the deadly "brain bomb".

Brain Bomb - Prologue

where to buy cheaper: prices at 1 store, Steam RU and KZ

Sea of Ghosts · releases 31 December 2026

Free to play: just add it to your Steam library. Only editions and DLC cost money.

Steam account region

Russia

Kazakhstan Other

System requirements will appear after syncing with Steam.

For a Russian account, listings with the “Russia & CIS” and “Global” activation regions work. “CIS excl. Russia” and “Kazakhstan” listings are flagged and do not activate in Russia.

Offers

Store	Listing type	Activation region	Payment	Price	True price	Updated
Steam Россия Standard Edition	to your library	РФ и СНГ	—	free	free	9 hours ago	On Steam
Steam Казахстан Standard Edition	to your library	Казахстанnot for your region	—	free	free	9 hours ago	On Steam

True price includes the top-up fee and the exchange rate, so you compare like with like.

How to buy from Russia

A key is activated in the Steam client; your account region must match the key’s region.

Buying directly on Steam: top up your wallet through a top-up service; its fee is already included in the true price.

The Kazakhstan price is available through a KZ wallet or as a gift from a friend in Kazakhstan.

FAQ

How much does Brain Bomb - Prologue cost?

Brain Bomb - Prologue is free to play: just add the game to your Steam library. Only editions, bundles and DLC cost money.

Can Brain Bomb - Prologue be activated in Russia?

Yes. The game is sold on Russian Steam, and keys with the “Russia & CIS” and “Global” regions activate on a Russian account.