Pros:

-Nice design and beautiful environment. Really captures the Portal atmosphere.
-Has different difficulty levels.
-Loads of custom content, traps etc.
-Lots of weapons and equipment to choose from.
-Custom music.
-The slow-motion effect upon the explosion of barrels works great.

Cons:

-Map lags a bit.
-Bots got stuck on the automatic doors at the beggining of the map and didn't follow until I started it.

Conclusion:

A real nice and fun survival/scavenge map, I don't know how I haven't seen this before. But it could use an update to fix the FPS issue.

Pros:

-Not just a port, but a complete modification. It's way better than the original one.

-Map destruction.

-Very difficult (some will consider this a con, but I like challenging campaigns).

-Different intro movies.

-Awesome finale.

-Custom weapons, like the Combat Knife and the Police Shield.

Cons:

-Needs some updates to improve performance.

-Game crashes sometimes when players die and restart the first map.

-The soldiers/zombies shooting at the survivors from the military vehicles was a great idea, but I'm afraid it's not working well. I shot them like crazy at different points and from different locations, but most of the times it looked like they were invincible and I ended up having to hide from them. Plus, bots don't understand the situation and die/get incapacitated every time. And seeing a zombie handling a weapon is weird, I think it would be better to use a human model.

-I don't think that making two versions of the map available was a good idea; we will need to have both installed since we don't know which one the players will be hosting. Crash Course is a L4D1 campaign, having only the original survivors would be enough.

Conclusion:

Great campaign, I strongly recommend it, even for people who didn't like the original Crash Course in the first place. It just needs some updates to improve performance and fix a few bugs/flaws. Keep up the good work.

Pros:

-Though the design is simple and lacks textures, it's creative and fun to play.

Cons:

-Orange/grey colors get boring quickly.
-A bit easy to get lost.
-Lacks Versus mode, which could be really nice.

Conclusion:

You did a good job with this map, the design is good and provides a fun gameplay (though I think it would be more fun in Versus mode). But, in my opinion, orange maps are a bit boring, they feel look unfinished and it kinda breaks the game's mood. I understand that, in order to add textures, you would have to remake the whole map cuz otherwise it would look really flat, but the simple addition of some Lego textures or something simple like that would do the trick.

Pros:

-Awesome design.
-Highly detailed, fascinating environment.
-Great flow and replay value.
-Custom infected and NPC models.
-Destruction events.
-Well balanced (though there was some lack of ammunition on the first maps, but that's ok, I don't think it should be changed).

Cons:

-None.

Conclusion:

Absolutely amazing campaign. I've been seeing some maps here that are even better than Valve ones, if I dare say so, and this is surely one of them.

Pros:

-Highly detailed and amazing maps; each one is unique.
-Fun, great replay value.
-The campaign will have a different flow everytime you play, since the parachutes on the airplane and the barricades on the great wall change their locations each time you start the map, and I really liked that.
-The finale is very creative, and a bit difficult when playing with bots or dumb people.

Cons:

-The skybox on the airplane bugs sometimes, showing just a bunch of grey instead of the moving sky, depending on the distance you are from the windows. But that's OK, it's not really a con.

Conclusion:

Perfect. I'm giving you my first 100, cuz you really deserve it =].

Pros:

-Extremely funny.
-Very faithful to the movie.
-The series of events make this map unique.
-Great design.
-Nice models for the LotR characters.
-L4D1 survivors to help (like in The Passing campaign).
-Bots play quite well, so even if there are not 4 human players you can still have a fun game and survive a long time.
-Good replay value.

Cons:

-No Legolas x]

Conclusion:

== Review updated to version 12 ==
Simply the best Survival I've ever played. It's different from anything you've seen out there, it's not just about surviving as long as you can like in other Survival maps. I recommend it to everyone, even if you're tired of or don't like The Lord of the Rings. I had complained before that it was impossible to complete the map, but now with version 12 you made it beatable, thank you very much, now we can enjoy the whole map, good job =]

Pros:

-Great design and well made levels.
-Nice idea for a campaign.
-It's pretty cool that you added a good working wind effect to push the survivors off the heliped on finale =].
-Excellent finale.
-Balanced difficulty.
-Good replay value.
-Looks like a Valve campaign, you did a great job on this.

Cons:

-The first tank on the finale suicided on both our attempts, when we were holding up in that place where there's a big statue of a man holding the planet, just above the office where you call the rescue.

Conclusion:

Download it.

Pros:

-Very well made and set in a really nice ambient, different from other L4D2 maps
-Great design and textures
-Despite having only one level, it's not short and takes some time to complete it (and a few retries as well xD)
-Awesome finale and Final Boss
-Good replay value

Cons:

-I found the finale too hard even on normal mode

Conclusion:

Awesome campaign, but seriously the finale is impossible, even if you manage to find that easter egg room full of supplies and play it on normal difficulty. The never ending hordes make it too hard to shoot the boss' weak point, and the players also have to shoot his eyes first, you should make it a bit easier to be compatible with the difficulty level.

Pros:

-Great design and textures.
-Very well made and complex levels, it's not just straightforward.
-Excellent finale, maybe the best I've ever seen in a custom campaign.
-Very balanced difficulty level.

Cons:

-None

Conclusion:

Looks just like a Valve quality campaign, you must download this one =]

Pros:

-Very detailed, beautiful and well made levels.
-Awesome gameplay.
-Good challenge.
-Great replay value.
-Nice finale, the plane's crash was a great idea.
-Not long, not that short... just the right length.

Cons:

-Could use a Versus mode.

Conclusion:

A MUST download. Looks just like a Valve campaign.

Pros:

-Excellent design.
-Fun and challenging gameplay.
-Very detailed and complex, has a lot of places to explore. You get lost sometimes and I really like that on a map, it's not just straightforward.
-Nice usage of visual effects on the finale, I've never seen that on a map before.
-L4D1 Survivors instead of the new ones (every custom map should use them ¬¬).
-Nice ending scene.
-No bugs

Cons:

-Finale's a bit disappointing, confusing and quite easy. I understand that the alien stuff is meant to be mysterious but it was nonsense, you just have to touch the monolith, kill some zombies and then everybody disappears and we don't know what happened. I was expecting something different.
-No survivor's conversation

Conclusion:

Great campaign, though the finale was disappointing to me, because I was expecting something more concrete and realistic. Anyway, I really recommend this map, it's definately worth playing, one of the best custom campaigns out there.

Pros:

-Absolutely great design and custom textures, the most detailed and professional map I've seen for this game
-Winter =]
-The chair lift was a pretty damn good idea and is working fine (aside from a bug that happens sometimes which puts two chairs together, but that's ok) , it's very fun to ride it while shooting zombies
-Good challenge

Cons:

-None

Conclusion:

Play it =]

Pros:

-Very well made, great design and beautiful custom textures
-Great ambients
-Has that scary and dark atmosphere
-Very fun gameplay
-Didn't see any bugs/glitches
-Good challenge (though sometimes it's really difficult even on normal mode cuz there are too many hordes)

Cons:

-I personally think you should put a normal moon instead of this one, I know it's meant to give a scarier feeling to the campaign, but it's totally unreal while the rest of the map is very detailed, beautiful and realistic
-That smiley face above the fireplace on the third map's saferoom seems disconnected from the map and kinda done in a hurry
-After you go up the ladders to the small corridors in the final map's tunnel, it seems like you could just keep going straight, without needing to go down to the tunnel again, but then suddenly you get blocked by a invisible wall; I think you should put some rocks or other stuff to make a more realistic blocked way there, cuz otherwise it wouldn't make sense for the survivors to go down again.

Conclusion:

Great campaign, you really did a great job dude =].

Pros:

-Very creative
-Short lenght, providing a fast and fun gameplay for those who want to play some Co-op but don't have much time
-Good design and textures on the train, looks pretty realistic

Cons:

-The exterior's movement could use some more detail, the trees are too white even when they're close
-No versus mode =/. I think it would be a nice idea to add it, it could be very fun

Conclusion:

It's very fun, good job. Maybe you could make a map like this one but with some sort of flying vehicle, it would be fun to see the survivors/infected falling to their death xD.

Pros:

-Great design and textures
-Diversified maps
-The ship area is awesome
-Excellent finale
-Creative and different rescue vehicle
-Very balanced difficulty
-Didn't see any bugs or glitches

Cons:

-Zombies disappear after dying on the ship map, leaving no corpse behind (not sure if it's just here)
-The Balloon (rescue vehicle) could use a better model and some fire to make it more realistic, it looks kinda done in a hurry

Conclusion:

Strongly recommended, very professional work, looks just like a Valve quality campaign, or even better...
This review is based on the map's gameplay before The Sacrifice update messed everything up, right now it really needs some updates to fix the missing/colored textures, lightning problems etc.

Pros:

-Awesome design and textures
-Unique ambient, different from the L4D standards
-Challenging
-Good replay value

Cons:

-Few ammo piles, I didn't see any near the UFO, this makes the map a bit too hard

Conclusion:

Strongly recommended for any Survival player looking for a good challenge.

Pros:

-Great design
-Really gets the feeling of Crash's old games
-Diversified maps with a lot of different Crash Bandicoot's ambients.
-Pretty fun
-Beautiful custom sounds and textures
-Good porting from L4D1 to L4D2
-Didn't see any bugs or glitches

Cons:

-Bots are really dumb sometimes, though it's not your fault, because the map's style makes the bots confused and that couldn't be different.
-Some character models, like the ones of Dr. Neo Cortex and Dr. N. Gin, are quite bad looking, but it's ok I understand how difficult it is to create a model, and that doesn't affect the gameplay.
-It's a bit difficult to reach the boat after defeating the final boss, because there are too many Tanks and they come from the same way you are heading, which is small so they can easily hit you and put you down

Conclusion:

Definitely a MUST play.

Pros:

-Absolutely awesome desing
-Very faithful to the game
-Fun gameplay
-Great custom textures and sounds
-Good difficult level

Cons:

-Needs more health packs

Conclusion:

One of the funniest Survival maps, specially if you enjoyed playing Pokémon on Game Boy... it reminds me of those good old days =]. It just needs some more health packs to easy it up a bit.