My first introduction to Unreal was via the "Unreal Tournament: Game of the Year Edition" right around the year 2000. I fondly remember some of those maps (Facing Worlds for one) but to think that lineage ends up at Fornite is crazy to me.
I was the same. UT was so much fun - bouncing flak cannon shrapnel round corners! But my LAN group all wanted to play CS or that UT mod that was similar (Tactical Ops?).
My introduction to programming was thru a different game (Subspace VIE, a MMO on dialup back in the 90s later community-remade as Continuum) when squad had a login page at a domain. I really wondered how example.com/?login worked and that led me to where I am today.
I spent probably thousands of hours playing Infiltration back in the day. I can't imagine how much time and energy must have been poured into completely re-doing a game like that.
But it's good that the games industry caught up so the infiltration-itch can be scratched in other ways.