4:05

Passing A Portal Through Itself

8:05

Resumo de viagens no tempo na ficção

24:52

What if all the world's biggest problems have the same solution?

12:30

I Made a Zero Player Game

10:04

The No Cloning Theorem

43:08

Every Softlock in Portal

6:22

A Incrível Eficiência dos Buracos Negros

14:08

Game Theory: Portal 2, Does Chell DIE?