They are events with (indeed) only eight cars on the grid raced on folk racing and rallycross style tracks, and generally more racing oriented so the AI is not as aggressive as in other event types and faster too.
Hey, guys. It's Mike. I've been playing Wreckfest since 2015. I just want to give you guys a heads up on the Rebelrat. It appears to have a bug in the engine sound. In other words, there is no sound on the Rebelrat. Please spread the word. Thanks
We was about half day late telling Janne about missing sound, to get a fix in the last hotfix.