It's clunky because it's old, has next to no tutorial, but I recommend it.

One of the first things you need to do is ditch road vehicles though. The roads get shot out from under them and they instantly die no matter how strong they are. Hover bikes and hover cars are the early game craft to grab. You put rinky dink lasers on them and swarm the enemy.

The downside of this is that the quantity of city damage you do missing your targets will piss off basically everyone whose buildings get blasted to bits.

If you're familiar with xcom it's not too hard to work out though, it's a cityscape setup like the geoscape, then it's tactical map missions. Soldiers even use and fire from cover in realtime combat it's pretty nifty.

Probably some jerryrigging required to make it run on newer systems. Dosbox if I recall? I think there was a modscene for it too.

There was an Open Source project for it as well but I don't know how successful they've been: https://www.ufopaedia.org/index.php/OpenApoc