Pros:

- Faithful reproduction of dialogue/level design with a ton of new and exciting twists!

- Enemy fire (a bit tough with all the damage they deal, but a fun concept/challenge nonetheless!)

- Bombing runs

- Exploding cars!

- Freaking BEAUTIFUL weather (the lightning in level 2 is fantastic)

Cons:

- Whenever I pass by a flaming barrel at a couple of spots, it's a 50/50 chance that one of the bots will get stuck right next to it, leading that bot to die. To make matters worse, the other bots stay behind and give up their secondary health (pills/shots).

- The intro on the second level (this gets annoying after dying 5 times in a row)

- The 2 ammo caches in the finale make things difficult. When I try to start the generator the third time, the bots will almost always move toward the ammo cache up above the storage room in the garage. While they're reloading up there, the hordes and multiple special infected have a free shot at me. Being defenseless against spitter/smoker/jockey/hunter combos while the bots dork around some 200 feet away with a neverending zombie horde separating us is frustrating to no end.

Conclusion:

The intensity for the finale needs to be reduced for single-player mode. Not once have I made it past the finale, despite at least 30 tries. To me, the intensity of the finale completely ruins this campaign. It may be doable for a 4-player co-op, but on my sub-par internet connection, I'm never going to be able to play this with even one other person. I'm willing to download any updates to see how they play out, but aside from that, I'm done with this campaign.

If you're in a similar situation with a slower internet speed, and you're looking for a Crash Course for L4D2, I'd recommend waiting until something else comes along.

Pros:

- It's Duke Freakin' Nukem

Cons:

- All of Duke's babes are zombies now

Conclusion:

Duke's blown-up nuclear subs, fought 20-foot cycloids, brought-down blimps, sent octobrains crying to their mommas and pig cops straight to Hell.

Zombie apocalypse? Too bad Duke forgot to bring some bubble gum.

Pros:

- Solid Snake has a better suit than Nick

Cons:

- None

Conclusion:

"I'm no hero. I'm just an old killer, hired to exterminate some zombies."

Mruh. Metal Gear.

Pros:

- Reanimated robot vigilante VS reanimated corpses? SWEET

- Even if it weren't free, I'D BUY THAT FOR A DOLLAR!!!

Cons:

- Abso-freakin'-lutely None

Conclusion:

*tank roars*
Dead or alive, you are coming with me.

Pros:

- Beautiful graffiti

- WONDERFUL environment! (I loved the Scream painting series)

- Thrilling pace of action

- The 1st safe room (HILARIOUS)

- Action-packed finale/escape

- Hidden area!

Cons:

- There wasn't an intro scene (how did survivors get there?)

- Occasional bot glitch

- A bit difficult to navigate the 2nd level

- NEEDS MORE TIER 2 WEAPONS

Conclusion:

I have not had this much fun in a campaign since the first time I played the Director's Cut of Dead Before Dawn. Frankly, the only reason I wouldn't rank this higher than DBD is a lack of custom voices. But still, my heart was pumping through the whole campaign! When you're playing it, you are totally absorbed in the atmosphere. Also, the Minecraft-inspired hidden area was fun. 

My biggest complaint is that no Tier 2 weapons are available until the end of Chapter 3. The only exception is the inclusion of a Sniper Rifle on Chapter 1. This means that, if you're playing alone, you have 3 bots running around with Sniper Rifles up until the finale level. NOT GOOD.

Aside from that main issue, I LOVED this campaign!

Pros:

Layout is REALLY darn close to MGS

Excellent use of surveillance cameras

Crows in the section where you first fight Vulcan Raven (^_^)

Good placement of weapons/ammo caches

A real blast

Cons:

Too difficult for a single-player playthrough (impossible, even)

Conclusion:

As I say, it's incredibly faithful to Metal Gear Solid. Watch out for the surveillance cameras, and DON'T PLAY THE SECOND LEVEL WITHOUT 3 OTHER PLAYERS. The A.I. (more like A.U. -- Artificial UNtelligence -- amirite?) will nuke you every time. If you and 3 other Metal Gearheads want something fun to do, this is it.

Pros:

- Fun atmosphere
- Good weapons placement
- Challenging

Cons:

- Lack of dialog made an otherwise fun campaign a little stale.

Conclusion:

I had to restart on Normal twice thanks to activating elevator switch on level 3. The peppering of special infected throughout the horde really made Napoleon proud with their constant divide & conquer tactics. That said, I enjoyed the challenge.

The only thing I would have loved about this would be the inclusion of more dialog between the characters. Maybe something during the elevator ride would have been nice.