Finished it in 5 hours on hard mode.
Yeah its short af, but its very good.
The final game is also far better optimized and prettier than the demo.
Music is a fucking 10/10, has sonic mayhem on it.
https://youtu.be/y0ElxV1LTkU?feature=shared
the upgrade system is very fleshed out, and can add incentive to replay chapters and encounters with different setups.
There isnt any incentive to replay besided going for high difficulties or, just simply finding the game fun.
I restarted on brutal right after finishing it the first time.
Regardless of what you think it's worth, if you loved doom 2016, this game is an easy recommend.
