Just picked this gem up on
GoG on sale for $14! First evening and I've already made it through the first campaign, though Iron Man mode is very much a non-starter!
I also concur with Magnum in that Red Panda's mods are the bee's knees. I'll have to check out the SiC sound mod, but so far I enjoy the stock sounds. BTW, if you don't have the Steam version of Door Kickers, you can still download mods using
these instructions by Red Panda. I couldn't get steamworkshopdownloader to work with Firefox, but it works fine with Internet Explorer.