Independent game studio · founded by Catalina & Asa

We make games we want to play.

Caisa Studios is a sister-and-brother studio building free browser games: battle royales, puzzles, obbies and runners. Every game is designed by us and plays instantly, with nothing to download.

4Games released
2Founders
270+Levels and worlds
FreeEvery game, in your browser
Our games

Released titles

Open any game in a new tab and play right away on a computer, tablet or phone.

Battle royale3D

Loot Island

Drop from the Sky Bus, glide onto a huge island, loot chests and outlast 1,000 bots inside a closing storm. Only three rainbow chests hold the best gear in the game.

1,000CPU players
34Weapons
82Free characters
Play Loot Island
PuzzleComing to phones

Boom Blocks

Place blocks on an 8×8 board and clear rows and columns. Travel through 101 hand-themed worlds, design your own blocks, and stay calm when the surprise hands shake the board.

101Worlds
3Game modes
432 HzCalm soundtrack
Play Boom Blocks
PlatformerObby

Pop Bop Obby

A side-on obstacle course across 27 themed worlds. Choose from 13 characters, each with a power of their own, from double jumps and gliding to slowing time.

135Levels
27Worlds
13Characters
Play Pop Bop Obby
Endless runner3D

Surge Runner

Play as Surge, a superhero robot, across five lanes of traps, drones and grabbing hands. Every level ends in a boss fight, and the levels never run out.

10Boss designs
10,000Skins
∞Levels
Play Surge Runner
The studio

Our parents said no. So we built our own games.

Caisa Studios started when Asa wasn't allowed to play Fortnite, the game everyone at school was talking about, and Catalina couldn't get the puzzle app she wanted. Instead of waiting, they decided to make their own.

Today the studio designs every game in-house: the ideas, the characters, the worlds and the rules. We build with AI as our programming partner, then playtest, fix and add the features our players ask for.

Catalina

Co-founder · Lead designer · Age 12

Puzzles, calm games and worlds full of detail. Creator of Boom Blocks.

Asa

Co-founder · Game designer · Age 9

Action, loot and big boss fights. Creator of Loot Island.

Design

We sketch the idea, the characters and how the game should feel.

Build

We build it with Claude, an AI, and test every new version ourselves.

Update

New worlds, characters and fixes keep coming based on what players want.