dangerous dave, commander keen, bomberman
golden duck shoot or something, dune 2000, AOE2 ... im not sure which one was the first, i had a PC at home for a brief period in 1997-1998 and I think also in 1999 in the classroom (only one classroom for 3rd grade had one really weak "portable" PC with a bunch of id software games - the PC i had at home I got dune 2000 from a friend and AOE2 from a fathers friend, but that office computer got ruined 3 times so father taken it way until 2004 when we got broadband and a new family PC, played a lot of GCN and N64 in the meantime which got me into zelda and metroid prime, but i haven't been really established on PC until 2008 when I got my own high-end PC, ofcourse custom built.
It's a too deep hole of gaming trivia, sometimes I wish I could go back to those places and turn those old PCs up to see what else really was on them I forgot.
I also played a game called Prehistoric at friends house, the name of the game was so funny so we had many jokes about it, it's a caveman running around hitting with the stick.
My 2 friends down the road and also classmates were way more advanced early on when it came to PC hardware, software, gaming, PC maintenance & troubleshooting, overclocking, they were around 12 years old and they knew all the stuff and they usually played Counter Strike and Quake later in the 2000-ies, but that's just because their parents could afford those expensive GPUs, PCs and internet service to give them a huge platform to learn on, one of the guys built a really good PC but only had one, the other guy got above average but he had like 3 PCs in the house with one, father worked at some economic-strategic-logistic company that just bought new PCs every 2 years and instead of throwing away he could just bring them home a few.