Zandronum

Most invasion maps become unplayable when using Brutal Doom, with huge drops on the framerate, due to sheer amount of gibs and bloodstains, so I need to circumvent this.

How do you reduce the maximum number of entities/objects?
Is there a way to make bodies, gibs and bloodstains disappear after a while OR limit their number so that old ones disappear when new ones spawn?

Yeah, with better design.

Random gore and blood are actors all the same. The platform can't really identify which ones are important on their own. This is instead a performance issue with the project itself, which would require the author to tend to if it is to be improved.