I'm well into "late game" on my current playthough in 2.4 on the "hard" setting. I'm pretty much dominate with 6 interceptor bases running Stingrays and two troop teams dropping in Herakles dropships (My favorite of all the ships, by the way - the deployment process is much more faithful to the original X-Com -- I always enjoyed the 'fall out' process and was always a little let down that my crew started already sort of randomly scattered in UFO:AI). The raptor doesn't seem to have enough room to pack in 8 fully equipped soldiers... and anyway, provides little or no cover in the first couple rounds (which, imo, is a main key to success in the harder difficulties)
I have more or less global coverage, at least on land, between bases and radar towers, so there's not too many UFOs getting by, mostly I let them land so I can feed the Antimatter beasts that are my ships... and to get both the heavy needler and particle cannon (as well as to scavenge for ammo), I conduct raids on one of the three alien bases I've located (haven't killed one since I don't want to end the game - I feel ending the game after a single base, especially when there's more than one was an unnecessary mistake... I mean, the game is unfinished, why make it end arbitrarily like that?? but that's another thing) anyway... My question is about the corruptor. I've run across one - I let it land, took it - the Alien AI is messed up, 6 of them hung out in the cockpit shooting the windows, so the mission was really easy -- but it's been a whole year (a YEAR) and I've not seen another one. I've done all the research there is, near as I can see - have the XVI map (which is broken - I went a whole month letting the aliens have their way, XVI went up 1% then dropped back to 0% when I recalled my people from the brothels...). Is there a way I can force-spawn some corruptor missions? also, bomber? Never seen a bomber at all, not ever in all the years I've played this game, I've never seen one. This is also the first time I've ever encountered a Corrupter too, but to be fair, I only started playing 2.4 a couple weeks ago, and the last time I played it was 2.3 and 2.3.1.
Anyway, I really do like the game, and I'm looking forward to it's evolution.