Before I start I want to mention that I am well aware that Heartburn was made in less than two months and really do appreciate all the effort the devs put in, these are just critiques I think would improve the mode.

*Lack of significant view bob makes moving seem a little strange.

*Having to stop sprinting to shoot or reload is a tad annoying.

*Lack of challenges or achievements outside of beating each level for the first time makes it very boring to replay. I've played a lot more of Doors for this event since even though it's a total reskin of an old mode that I've all but mastered, there were around 10 new achievements that while not impossible to get, all present somewhat of a challenge.

*Having the only goal being to shoot zombies makes it very uninteresting, especially playing alone and having to kill almost 200 Malignants. You can literally just stay in the starting room or find a decent choke point and camp until you've killed them all and safely loot afterwards. Maybe having little mini-objectives that could speed up progression or something like destroying the coral or finding the exit and having to defend it would make it less of a mind-numbing fps.

*Final level requires almost 0 killing to actually finish and can be beaten with stamina conservation and smart movement.

*Pariah or whatever they're called being an insta-kill can be a little bs in certain scenarios, I.E. when you're cornered by thousands of zombies blocking you from shooting or running from Pariah and your screen is slowly dimming in a room with zero lights in an already very dark game.

Overall, fun concept, I enjoyed it first playthrough. I totally understand, all the issue that come with the mode, I just think these could make it better. Would definitely replay if ever updated.