Games & software
Interactive things with real depth. Our first is Beehive.py, a factory game you play by writing actual Python.
shipping now
software · hardware · everything between
Collatz Labs
Simple rules. Surprising results.
A two-person build lab from Roßdorf, Germany. We make software, hardware, and the things in between — starting with a game that teaches you to code for real.
the mark — one cube, many faces
why we’re called Collatz
Take any number. Follow two rules. Where do you end up?
The Collatz conjecture is one of the simplest open questions in mathematics. Take a number. If it’s even, halve it. If it’s odd, triple it and add one. Repeat.
even n / 2
odd 3n + 1
Do you always reach 1? Since 1937, nobody has been able to prove it. Two rules — one unsolved problem.
That’s the whole idea behind us. Give something simple a set of honest rules, and watch what grows. It’s how good math works. It’s how good code works. It’s how we build.
n = 27 → 1 in 111 steps
value (log scale) · steps →
not tied to a single project
One lab, many builds.
We started with a game, but Collatz Labs isn’t a one-game studio. The craft is the same whether it runs on a screen or sits on a desk.
Hardware & systems
We build and configure machines, too — the physical side of the same craft, from parts to a running system.
Whatever’s next
New projects join the lab whenever the idea is good enough. The name is a promise: simple rules, room to grow.
shipping now
The lab’s first release.
Beehive.py turns learning to code into a factory game. You write real Python to command a swarm of bees, automate a growing factory, and build the Great Hive — and every line you write is a skill you keep.
// now on Steam
Beehive.py
Learn real Python by playing.
Write actual code — not blocks, not pseudocode. From your first while loop to real concurrency across four interpreters.
Visit the game →
the two of us
A mathematician and a banker, after hours.
Collatz Labs is Johannes and Tristan — one deep in mathematics, one in finance — building after work between Roßdorf and Bottrop. No publisher, no budget, no deadline. We make the things we’d want to use, and we don’t ship them until they’re good.
Johannes Block
Mathematics student
engine · gameplay · systems
Tristan Liebeck
Finance & compliance
design · business · outreach