Pros:
+ The locations of the last two maps, I guess? I don't think there are other campaigns out there that have vast open spaces.
Cons:
- Underwater sections - Ammunition is scarce - Explosive Barrels - Magnum pistols are rare - Bad item locations - Unforgiving finale - The train that rams you in chapter 1 - Overall unfair campaign
Conclusion:
Played this with 8 survivors, not only because I wanted to, but because I knew I was going to need extra help. This whole campaign makes me wonder... Have you even tried this? No seriously, it's hard to not think you didn't. It's a port, yes. But that's no excuse for not changing the level design. You don't just add guns and ammo, and even then they're placed pretty badly. The train in chapter 1 should just be removed. It doesn't really serve any actual purpose other than annoy you. Explosive Barrels make this campaign unfair. I find myself forced to use my pipe bombs just to remove them from a safe distance, but I don't always have one. And then in some maps, they fall right on you and your teammates and explode. And there's that room in Aquaphobia filled with them. If they all explode, you get incapacitated instantly. I was still in the entrance when that happened. Just remove most of them from the campaign and that will be a major improvement by itself. The underwater sections are too long, and it's very confusing where you need to go the first time you play through. When you create a campaign, you have to make sure that it's not impossible for a lone survivor with just 1 health and only a pistol to make it to the end. The finale is the main thing that ruins this campaign. Sure, in Half-Life 2 you drive through this map which would explain why it's long, but ammo is very scarce; there's only three ammo piles from where the radio is with one of them being in an Easter Egg location that few know about and is easy to miss. If there's more, don't blame me, because where ever they are, I'm pretty certain they're not in good locations. Since it's a gauntlet finale, more pain pills and adrenaline shots should be placed, especially the later due to all the water slowing you down. Also, one time, I faced three tanks in this finale. The horde kept on coming while facing the second Tank, which is hardly fair, especially since the area was nothing but water to drown you when incapacitated. The third one appeared just before the point where the rescue has arrived music starts. As if it wasn't already awfully hard enough. I played on Advanced difficulty. You're supposed to play with only 4 survivors, yet I almost didn't make it with 8, where only two of us escaped. The other one was just a bot who teleported to me right outside the final saferoom. As a small detail, you should've added an SMG spawn and shotgun spawn in it. Compared to Water Hazard, this campaign is the lesser one. It really needs a lot of improvement, but I'm not going to hold my breath.
The Voice's Fault.