This is an extended version of Cyberblutch's Rebirth Beta 01 Mod. The extensions were either released by Cyberblutch himself (like the monkeys) or taken from a fanmission that he had contributed a model to (like the rumbler) or are modifications by other parties. The current version is Beta 05, see the homepage for a download.
The new models are quite frankly horrible. Especially the cyborg midwife which originally was an old haggered looking woman more machine then human. In this version it looks like some kind of wierd cyborg porn, nipples and all. Worse still the animations for deaths literally fall flat. Avoid this at all costs, there are mods that replace the textures of effects and the environment use those instead.