John and Matt (John is my brother, incidentally) have been friends since they were very young, for about 25 years. After university they had the idea of making an insect game, Matt had the name "Empires of the Undergrowth" in his head for years apparently.
Liam is also a very old friend, but John met Liam in college, not secondary school, so we've known him for about 20 years. When John and Matt decided they definitely wanted to have a go at doing this properly, he came on board. That was around 2013-2014.