>>96770920
Every few months I see an "Ace Combat RPG" thread pop up, with people asking what is available. On one hand, there are air combat wargames that people have added RPG layers to (and then never share their houserules where people can find them). On the other, there are RPGs that focus on WW1, or dieselpunk 1930's/40's, or Cold War aircraft and pilots.
What people seem to be craving is a game that strikes the middle ground, and does for air combat what Battle Century and Lancer did for mecha.

>>96772950
>>96774029
>BattleTech but as a TTRPG
The problem with Mechwarrior is that only 3rd edition (a.k.a. Classic BattleTech RPG) had RPG rules for the mech fights, as opposed to "play the wargame." Oh, and I guess MW: Destiny can do that, but in my opinion that game is far too rules-lite for the purpose.
>UC Gundam
Best would be Jovian Chronicles, which is, yes, quite old at this point. More modern takes are Armour Astir (example setting is fantasy, but works fine for sci-fi) and Beam Saber. Both of those lean into the personal drama between pilots, and eschew the wargame roots of Jovian Chronicles.