Here's some specifications
Ki-100Ia
2 x 12.7mm MG's and 2 x 20mm cannons
Mitsubishi Ha-112-II engine, 1500 HP
272 built
580km/6,000m
Climbs 16,400ft in 6 minutes or roughly 2700ft a minute
Ki-100-Ib
Engine is roughly a tab better, being a Ha-112-IIru, its made for high alt interceptions, doing 590km/10,000m
same loadout as Ia
Also I am showing only 390 Ki-100s were built in total between the 2 models.
Comparing this to the Ki-84 and N1K I agree with Krusty, its nothing special -
and tales of the Ki-100 shooting down massive american planes is purely propaganda, for example on July 18th 1945, 25 Ki-100's tangled with P-51 mustangs of the 111th Regiment (Who were skilled pilots not rookies) - it was pretty much a tie as a few mustang's were downed, but only 4 of the Ki-100s returned to base.
The myth concerning the 8 Ki-100s that shot down 22 Hellcats without a loss, is nothing but - propaganda, its been stated the Hellcats were mainly on a bombing run and most were downed to ack with an actual loss of only 4 hellcats, im guessing to the Ki-100s and the Ack itself.
It deserves it's place in Aces High, but don't except it to be anything other then an upgraded Ki-61.