You ever have a cherished old game right on the tip of your tongue? As a '90s PC kid I got a million of 'em. Thankfully, my memories are often so vivid, that I can remember where I was when I played them, as well as details like the box (usually borrowed jewel case) art.
Urban Assault, a 1998 FPS/RTS hybrid, is one of those games that I bring up often; but no one has ever really seemed to share my passion for it. It was there that my fascination with the overlapping genres began, which had a handful of dalliances over the past few decades.
Disintegration is another brave soul that attempts to meld the two genres, but like its predecessors, it ends up juggling too much.