
done in just under 20 hours which is not bad from what I seen
The hardest levels in my opinion were tf63 and omega facility, I think tf63 was very difficult for me since it was the second mission I decided to try on rage mode and didn't have enough experience.
Then omega facility submarine bit required some locking in but the final bit with the invisible cunts was so annoying and probably took me the most attempts out of anything in the whole game.
Horizon facility was hard and wouldn't have been do-able for me without smart gun to be honest but actually wasn't as painful as I thought it would be for a final level. The very last part where there were 6 brains to destroy was the worst, I already died enough times trying to take out the 3
Anyways if someone hasn't done it I recommend it, it sounds like torture and sort of is but once you understand it, its fun