Well this will be hilarious. Storytime, people.
I first found out about SRB2 via a video of a stage in TEI that looked like Mystic Realm's Prismatic Angel Zone, and it was a speedrun. I found the video with the search query "3D Sonic fangame fun" and apparently YouTube was right, this was a 3D Sonic fangame that was win. The next related video was labeled "Soviet Russia Blast 2" And so I thought that the game was Soviet Russia Blast 2, and not Sonic Robo Blast 2. And I tried to Google for SRB2 to find a download, coming across the SRB2.org main website, and downloaded it, to find, to my dismay, that the game was "Sonic Robo Blast 2" instead of that "Soviet Russia Blast 2" that I thought it was, and thinking it was an error, I looked around to see if I downloaded the wrong game, and ended up downloading SRB2 again thinking that I had the wrong SRB2! And so I finished the download, and figured it would be worth a try, and that's how I found out about SRB2