Minecraft. It was probably the inspiration for my entire career path, to be honest. When I first played it, it ran horribly. I had an Athlon II and 4gb of ram running Windows Vista. After a few months I bought some AMD gpu that was waaaay too big for my Dell SFF case. I tried modding (read “hacking up”) my case, but couldn’t get it to fit. Wound up building an entirely new computer about a year later after scraping up all my birthday and Christmas money. After that I bought a high refresh rate monitor, then a better mouse, keyboard, and you know how the story goes from there.