So much better than the vanilla Q2 campaign, thanks to all the years that have passed where players and designers both have come to understand the best ways to use monsters and design level geometry around them. Feels like a Quake mapping jam / Doom community project, there's a solid variety of map types and I was particularly happy to see more than one map with slaughter DNA very upfront. Would recommend Operation Corpse Run in particular if you're not sure that you want to spend time playing the full thing yet - Really impressed me with its aggressive action.