BystroCube

A world of blocks: dig, build and survive. Free, right in your browser.

Free, no ads, no tracking

About

Build whatever you imagine

Dig, build and explore a world of blocks. In creative mode you have every block, in survival mode you have to collect them.

No chat

You cannot type in the game and no strangers can talk to children. There are no accounts and no ads either.

Parent lock

The harder survival mode can only be switched on by a parent, in the parent settings protected by a four-digit code.

Multiplayer

Play together over the internet: one player starts a game (🌐 Online), the others enter the room code or open the link, from PC or mobile, up to 6 players. On the same Wi‑Fi it also works in the Android app. Shared worlds are temporary for now.

Story: a castle, a kingdom and a dragon

Build a real castle with walls, towers, a gate and a roof. When it is finished, a golden gate opens into a dusky kingdom that has to be explored. Monsters attack there, the map uncovers step by step, and in the middle stands a tower guarded by a dragon. Defeat it, free the princess, prince or knight (your choice) and they move into your castle.

Guide: how to play

Controls

Computer: WASD walk, mouse look, left button digs and attacks, right button builds, Space jumps (twice = fly), keys 1–9 pick a block, Shift sneaks. Phone: left thumb walks, right thumb looks, buttons ⛏ dig, 🧱 build and ⬆ jump.

Survival

In survival mode you have hearts and hunger. Monsters attack at night. You have to collect blocks and craft things in the 🔨 menu (key E). A bed sets your home (key H takes you back). Eat apples, eggs and bread (key F).

Mines and tools

Blocks take time to dig and tools make it faster. Look for a ladder shaft on the surface: it leads into a mine with ores. Iron ore and rare modrit lie deep underground. Use them to craft an iron pickaxe, an iron sword and armor that reduces damage.

The castle

The game guides you through a series of quests, “The Master Miner’s Path”. The last one is to build a castle: walls, tall walls, a gate, windows, a roof, a fence and a gold trophy, all around your bed. Tap the quest to see what is missing. Then you choose whom to rescue.

The kingdom and the dragon

The golden gate by your bed leads into the kingdom. You only see a short distance, and the map at the top right uncovers as you walk. Beat monsters with a sword to get ores, stars and gems. You can only hit the dragon by the tower when it lands. After it falls, the seal disappears and you climb the ladder up.

Playing with friends

The 🌐 Online button: one player starts a game and gets a code, the others enter it or open the link. Up to 6 players from PC and phone over the internet. In the Android app it also works on the same Wi‑Fi. There is no chat in the game.

Tell me what you would like

I will keep adding to BystroCube. Write what you would like to see in it, or what bothers you. I read every message.

Join the discussion

Play fullscreen

Android: after you tap ▶ the game opens fullscreen. iPhone: in Safari tap Share → Add to Home Screen and start the game from the icon; it opens without the browser bar.

How to change the language

The game opens in your device's language (10 languages; any other device language gives English). To change it: tap the lock 🔒 at the top right, enter the parent code and choose "Language".

Support the author

I make Bystrohry alone, in the evenings. The games on the website are free and ad-free. If you like them and want to support the author, you can send any amount. It is voluntary and unlocks nothing.

Account number (CZK): 670100-2232740840/6210
IBAN: CZ24 6210 6701 0022 3274 0840
Recipient: Miloš Hrušovský – Bystrohry (IČO 30203660)
Message to the recipient (optional): Podpora Bystrohry

QR payment for Czech and Slovak banks: scan it in your banking app. From abroad, use the IBAN. The account is in Czech koruna (CZK); your bank converts other currencies.