Ragnarok Engine again, re Owlalisks: whoa! It’s an owlalisk! I’d have used an extra owl, myself, but that is quite the hybrid. Is this Chaositech full of stuff like that?
In addition to fluff on possible cults and some new Chaos-inspired spells, the bulk of the book is dedicated to the titular Chaositech, a good 50 pages of weird and alien technology. Weirdtech guns and bombs, symbiotic implants, crude surgical cyborgery, everything under the sun. Except somehow it's not Technology per se, it's Chaotic and antithetical to Law. Yeah. And learning how to build and implant it drives you insane over time.
The last few chapters include rules for mutation (including templates that can be applied to creatures or PCs), with a version of Warhammer's ever-popular Random Mutation Tables and a chapter of monstrous foes. The monster chapter concentrates on the Galchutt, the category of monsters that are to True Chaos what Demons and Devils are to their respective alignments.
This chapter also gives us a number of wonderful templates, like the Fused Aberration template used to build the Owlalisk. Other wonderful templates include Chaos-Altered Creature (a creature that has been subjected to Chaos Surgery to "improve" it and add weird tech from the previous chapter, the example is an Owlbear with bone lacing and a blinding ray gun!) and Chaosamaton (a template for turning a set of creature stats into a completely mechanical (but somehow still "chaotic") clockwork monstrosity. The example here is a clockwork Purple Worm with a Disintegration beam in its head!)
There is a whole lot of awesomeness in this book, but it's so scrambled together and confused that it gets nonsensical. I had planned to split it out and use the Chaos Cults, Mutations, and Galchutt as one threat and the Chaositech (stripped of some of the anti-Law nonsense) and weird creature templates as another, possibly as the foot soldiers and technology of a Neogi invasion from the stars. It's a 3.X book full of crunch, so it would be difficult to use as much more than a source of inspiration for 4E.