Technically, the first computer game I ever completed was a survival horror game making fun of my school which I wrote in 2009. It was written for Windows using C++ and was text based. I lost the source a long time ago, but the executable has been sitting on my google drive since 2014.

I did actually make a few computer games before that in PHP and VB from 2005 to 2008, but I never finished any of those projects.