Brain Games started back in 2001, basically creating remakes of classic MSX and ZX Spectrum games; some on my own, some with many collaborators from the MSX scene. Since then, I've worked in many other games, some for PC, some for MSX, and some for Amstrad CPC. All Brain Games are free, and most are open source. This is my hobby, and I do not make any money out of it. However, some of my MSX and CPC games have physical editions and can be bought through Matranet. Those cost money, as it costs money to manufacture the physical editions.
If you are interested in my actual work, you can find more about it on my website.