ChaosEsque uses a version of the Darkplaces engine forked 10 years ago (right before they broke rendering on old intel integrated GPUs). It ports over some features from time to time.

Additionally we did some more intensive hacking on the engine and extended the 32k entity limit to a new maximum of 4 million networkable entities. We had requested this before but were told that "it's too hard to change all the darkplaces internals to support this". It wasn't too hard for us. It did take 3 weeks of investigation and tracing of the uncommented code.

Our version also retains "LordHavoc"s actual given name: Forest Hale, in the credits. Not his new "sawn-off-dick-and-balls-one-year-after-joining-google" (ashley rose 'LadyHavoc' Hale). As our fork predates any of that.

Additionally: our fork of Xonotic predates Xonotic itself: the rcal pistol and various other changes were from the Nexuiz days. We also are the ones who campaigned for Nexuiz to be forked in the first place (since LordHavoc was CHOPPING off weapons from the game): So yes: we are responsible for all of it to begin with.