Pros:

-One of the best campaigns I've seen.
-Supports Custom Melee Weapons.
-Very Historic Lookin Areas.
-5 maps total.
-Lots of Updating.
-Good Co-op, survival, and versus maps.
-Beautiful Environment.
-Good Detail.
-Fairly Long.
-A satisfying finale.
-Plenty of replay value.

Cons:

-Moments of slow pace.
-Finale is kind of easy.
-Some few glitches here and there.

Conclusion:

This is an extremely good campaign, and i had fun with it. I've played it almost 2 years ago and it is still enjoyable (This was my first downloaded campaign by the way).

Pros:

-Brilliant Idea.
-So far the only Nemesis Skin.
-Custom Sounds.

Cons:

-I wish he was remodeled too. ;_;
-Low Quality Texture

Conclusion:

Awesome idea. I loved the Nemesis from Resident Evil, but the texture of such low quality! I know the graphics in the picture are not at the highest, but in high settings, it looks better, but still lousy.

[NOTE: Review updated more seriously as of December 30, 2012.]

Pros:

-Gold Gun
-Frickin Beautiful & Down Right Gorgeous
-Something So Simple is SO AWESOME!
-It's a gold version of an uzi... Not a pistol like always.

Cons:

-It is too simple and anyone can make this without much effort required... But it's unique because you are first to make the gold uzi

Conclusion:

AWESOME! Could use some more detail though

Pros:

-Well Detailed In Certain Areas
-Nice to see a futuristic campaign
-Cinemetic Scene at the beggining
-Background of the city looks awesome (But is in 2D)
-The windows with the frosted glass look is awesome
-The Water Detail is fantastic
-I like the white structures, people who say it's poor quality have never seen Mirrors Edge.
-Almost gives a mirrors edge feel

Cons:

-Bots have very poor navigation at 1st Level
-It's well detailed but not in the indoor sections.
-Finale was awful.
-It is definitly unfinished
-No Soundtracks at first level D:<
-Very Linear

Conclusion:

I hope you would continue with these maps, because they're awesome. This campaign is not bad and the ratings are good. It would be cool to see something new in the future. Glad to know your continuing.

Pros:

-My favorite WWII weapon.
-DOD!
-Custom Sounds.
-Reanimated
-We could use some more WWII skins.

Cons:

-Simple port over from DOD Source.
-No HD Texture.
-Sounds are sorta quiet.
-Not sure if the "Sturmgewehr-1944" really sounds like that.

Conclusion:

Great Job! My Grandfather would be proud. Well maybe not really, because this is a video game, but overall amazing.

I still have to say that the sounds and textures need editing. I really wanna give it a 10, but those minor problems are a drawback, and I like to review things accurately instead of giving it the Maxed Score just because I like it.

Pros:

-Brings back old HL2 memories. HL2 should have included this.
-Very good skin for SCAR-L.
-Laser Sight Attachment.
-Scope on the Model.
-Glow in the dark buttons.
-Futuristic Appearance.
-My Favorite SCAR-L skin for now.
-We need more of these types of skins.

Cons:

-Simple port over from HL2 Beta with minor changes.
-Useless scope, but SCAR-L has none anyway.
-Could have been used for SG552 (Especially for German Players).
-No HD Texture. Simply uses an unedited HL2 Beta 2003 Texture. That's old!

Conclusion:

Great job! Could have used some editing for the texture, but this is going used by me for along time.

Pros:

-My favorite assault rifle.
-Better than the crappy American M16.
-HD Textures.
-HD Model.
-Custom Animations.
-Best M16 Skin so far.

Cons:

-Can't think of anything... Maybe it could us some new scripts? Not like it matters.

Conclusion:

By far hands down the best skin for the M16. One of those rare occasions were I can't even think of one con no matter how hard I try!

Pros:

-A bad ass character here.
-RE.
-Vector=Awesome.
-A whole new model.
-Well detailed.
-1st Person Arms.

Cons:

-Hands aren't great, but compared to most people who make these low poly hands... It's good.

Conclusion:

A mod from manix33... Good to see you back in action.

Pros:

-Um... Colorful?
-If it's true that you are 10, then this is pretty good I guess.
-Good for American Patriots and/or Religious People (I think).
-A little better than before. Good job, but needs improvement.

Cons:

-MS Paint Job... But improved.
-Very low quality look... It's like a rainbow
-Seems proselytizing
-Patriotism and Religion in L4D2 guns? WTF!?
-The clips looks like crap... Just plain red.
-Looks more french than american now.
-Definetly doesn't look like a spray paint job but more like an MS Spray Paint Job.
-If ur gonna make an American Patriot Gun... Why mix it with religion? I bet a god would dispise the US due to the serious issues we have today.
-Just plain ugly... I'm sorry if that insults you, but improve a lil bit and maybe it'll be better in the future.

Conclusion:

NEEDS TONS OF WORK! Ask some profesional modders and skinners for help with texture creation. I guess this would be like a 90/100 for a 10 yr old but in Left 4 Dead 2 Mods overall... This would be like a 10/100, but I am going to let it slide and give you a 20/100. Anyway: Please dont use Proseltysing and True Blue American Methods for weapon skins... It just seems wierd. I will rase my rating when this updates and improves, so you have a lot of work to do on the gun. LASTLY: You should perhaps use Gimp 2 for texturing. It can make more high quality textures and it is free unlike the scam program called photoshop.

1/9/12 EDIT: I forgot to update my review for you after the update! So here it is! A 45/100! Still needs some less MS Paint look and more realism though.

Pros:

-Colorful?
-Maybe True Blue Americans who don't know how the flag looks like may DL this.
-Colt Model! That's something good maybe.
-Custom Sounds.
-Your 10. Maybe that's something worth talent I guess.
-I'm the 5th DL, and I deleted this after testing. HURRAY! :D

Cons:

-STILL looks like an MS Paint Job!
-Very low quality look... It's like a rainbow gun in a 1997 Game!
-Seems proselytizing.
-Patriotism in L4D2 guns? WTF!?
-Looks even more french than american now. LOOK AT THE U.S. FLAG!!! NOTHIN LIKE THIS!
-Just plain ugly... I'm sorry if that insults you, but improve a lil bit and maybe it'll be better in the future.
-Deagle was way better (although it still ain't very good).
-MORE RAINBOW LOOKIN AND MORE BRIGHT LOOKIN! WTF!
-Makes Arby26 look terrible. If I were him I'd rather not get credit.
-Update the fuzzy pictures!
-Like Leilei said... "Looks like you're shooting pepsi for Jezus and America!"
-New Sounds are kinda cheap.

Conclusion:

You can say I'm a troll, but I'm sorry dude. This needs work! Just have some practice, and you'll improve. Oh yeah and get some ideas from more profesional skinners and modders. They know a lot.

P.S. PLEASE DONT MAKE A KIDDY MOD! You may need some experience first. 

1/9/12 EDIT: Oh and update this if you can. You need some practice for skinning if you really wanna be good.

Pros:

-DAMN... This campaign was amazing!
-The scripting was awesome.
-The Level Design was beautiful.
-The World is HUMONGOUS!
-In Map 2 I think... There's a never ending pit (trap) It's so HUGE!
-Map 1: When you enter the elevator, it was one damn fun ride!
-Easter Eggs were very interesting and funny.
-Well Scattered Supplies.
-Well made Obsticales.
-The Sentry Turrets.
-For Traps and Sentry Turret: I liked the blue lasers on em.
-Very Long Gameplay Time: 2hrs 30mins without dieing, and up to 4hrs on first play.
-Good for MP.
-Good for SP too.
-Amazing events.
-The Survivor at map 4.
-Videos on tv screens showing infections and xrays.
-When meeting the survivor, a well made video clip is shown. Is the actor you?
-One of the Best Maps i've ever seen.
-Action Packed!
-Boomer Toilet Easter Egg LOL!
-Amazing Environment!
-KF Witch Sounds.
-Twitching Bodies.
-Infected Hiding on Ceilings and Vents.
-Garbage Boy Zombie in the Boat at Map 1! LOL!
-Finale was great and I loved the Scavenge Idea... Oh and also the sentry turrets!
-The Ending Cinemetic=AWESOME!
-Cresendo Events were great!
-Just The Perfect Campaign.
-Industrial Military Base Zombie Hideout is a great concept.
-Brilliant Campaign.
-Zombie Cages in Map 1.
-Custom Sounds, Models, and Textures.
-Map 2: Challenging alarm moment.
-Map 3: Blast Door Event was an interesting challenge.
-Map 4: The Saferoom is not safe for along time... The wall breaks and the vents too (Can also be a con for noobs).
-Endless Zombie Hordes (Can also be a con for noobs).
-I RECOMMEND THIS CAMPAIGN!

Cons:

-Laggy and Buggy.
-HUGE LAG AT WITCH ROOM.
-When killing a few witches in the Witch Room... More spawn and cause Lag, Bugs, Glitches, Framerate Issues, and Strange Lighting and Shadow Effects.
-A rare glitch happens in Witch Room where when you kill a witch... MILLIONS OF MORE SPAWN, and the game goes through serious issues where it's  unplayable... The Witches are invisible, LAG IS TREMENDOUS, Framrate issues become so increasingly high that it takes about 15 seconds per frame, the game crashes after several minutes... I had to exit and restart... WTF.
-The Witch Room is impossible... Even after I threw in every explosive I could find and preparing myself, I constantly die since they kill you one hit! Maybe in MP it could be easier since players actually cooperate!
-IF YOUR A NOOB! Either dont DL this or use cheats.
-Unfinished... NEEDS UPDATING!
-Sentry Turrets had a poor model (But No Problem).
-Easy to get Lost in.
-Frustrating Moments.
-Map 3: The Gate takes for ever to open. The First one took so long, but after finding out that there were 3 more super time consuming gates... I got really frustrated.
-Zombie Hordes were so endless, I barely had a break from em.
-Map 4 saferoom can be annoying.
-Sad that some people underrate the best campaign in existance.
-VERY FEW TANKS!
-AI can be pretty dumb in chapter 2.

Conclusion:

Its one of the best campaigns ever. It's action-packed and Fun as hell, but is so challenging (esspecially the witch room) and is buggy. I strongly recommend it to Action Lovers and Pros! To Noobs... Play easy and be very well prepared!

To GARBAGE BOY: Please Update this... This campaign is so awesome, but it is unfinished and hasn't been updated in such a long time!.

Pros:

-Custom Survivor Skins.
-Custom Infected Skins.
-How Did you get that awesome alien queen model
-Perfect With Green Blood.
-Perfect With Xenomorph Common Infected Replacement Mod.
-Chalenging.
-The Custom Models and Textures.
-Good Maze and Puzzle Game.
-Arcade Style.
-Brings Good Memories of Arcade Games.
-L4D1 Survivors... YAY!
-Lots of Maps.
-Tons of Gameplay Time.
-Finale was interesting but at the same time it was stupid.
-Leafo campains rule.
-Old School FPS.
-Brilliant Idea.
-Fun at certain parts.

Cons:

-VERY INCOMPLETE!
-This is your last campaign... WHY!?
-Glitchy & Buggy.
-Poor Quality Textures.
-Very Dark.
-Easy to get Lost.
-In the last level... Are the doors even openable? I found a battery and no switch. I had to noclip out!
-Leafo seems to hate valve due to the way he talks about em.
-This has to be updated.
-SADLY UNDER-RATED By Some and OVER-RATED By Others!
-Pulse Rifle has to be made useable, otherwise dont add it.
-Campaign is SO BORING most of the time!
-Special Infected Skins would be better with new models.
-Lack of new sounds and soundtracks.
-Lack of original L4D2 soundtracks.
-Serious Lack of Tanks... Only one tank in the whole game.
-AGAIN: Finale was interesting but at the same time it was stupid.
-This campaign is broken.
-SO PITCH BLACK! Esspecially the Tunnel Areas and Finale.
-Film Grain seems to be a higher level than normal. ANNOYING!
-So many time consuming moments.

Conclusion:

Average Campaign... Needs updating! If your not gonna come back to finish this, then CAN SOMEONE PLEASE TAKE THIS CAMPAIGN, MIRROR IT, AND UPDATE IT! PLEASE!!! I want it finished. It seems so cool! I'm praying for the full release! PLEASE Leafo or anyone... I wanna see this completed. It's so awesome and when it first came out, I was like I CAN'T WAIT! But now I'm just plain sad to know that one of my favorite campaigns is being abandoned.

Pros:

-HD Skin.
-Based off the real life Epinephrine Autoinjector (EpiPen).
-Realistic.
-Awesome!
-Labels on it.

Cons:

-Really.................. *Bursts Out Laughing*

Conclusion:

It's a very good skin. I love the adreniline shot skins (although there's only like 2-3 skins). It's the best skin along with the zombrex skin.

Pros:

-BEST CHARGER SKIN IN WORLD HISTORY.
-Fire Trail Effects.
-Explosion when ever he runs into a wall.
-Nice Jump Suit.
-Orange color allows an easy way to spot him.
-The effects are like fire works! :D
-Combining skin with the FEV Virus Skin gives an awesome Demon Effect.

Cons:

-NONE!

HOW DARE YOU L4DMaps FOR FORCING US TO PUT CONS EVEN IF THERE ARE NONE!

Conclusion:

PERFECTION RIGHT HERE!

Pros:

-I love fallout!
-Very good skin
-Now has a ragdoll  while almost every other remodel for an npc does not
-Fits well for charger

Cons:

-Can be a bit glitchy... The ragdoll sometimes seems spazy
-No online model D:<

Conclusion:

Very good model... Was hoping for an online one though.

Pros:

-Potal 2 Music
-Somehow fits th witch
-Fun to play with portal 2 mods and skins

Cons:

-Makes me wanna kill witches and here by makes me die and get blamed by players.

Conclusion:

Strangely Fits and is quite awesome to play with.

Pros:

-Dead Rising 2 Skin
-Fits perfectly for left 4 dead 2
-Awesome lookin
-High quality texture
-Blue Color

Cons:

-What the hell is a con? Never heard of that word!

Conclusion:

Fits well with the left 4 dead environment and is very high quality

Pros:

-Nice Skin
-Snake Skin Clothing Looks Cool
-He looks richer than before
-Black Shirt and pants
-Custom Firstperson View

Cons:

-WHAT THE FU** IS A CON

Conclusion:

Awesome skin... That is all

Pros:

-Cool Skin
-Jigglebone structure in her hair and dress
-Looks exactly like the real zelda
-Custom First Person
-Face Animations
-Boomer Bile Texture Works
-Perfectly Made

Cons:

-Im not a fan of these characters like zelda... But i downloaded the skin because it just Pretty cool.
-Sometimes I get random glitches with the jigglebones: Like the legs go through the dress and the hair is like floaty randomly... This rarely happened and maybe it just my pc.

Conclusion:

Good Skin as far as i can tell. I had fun playin with it and etc.

Pros:

-THE BIG SIS DUH!
-Bad ass
-Good skin
-Good quality texture
-Glowing Red Eyes Make her look cool
-The stuff on her like the blades look badass

Cons:

-Oxygen Tank is very Glitchy Lookin... It streches and bends depending on how she moves
-Blades on her arm appear funny
-No custom first person view

Conclusion:

Good skin... It looks badass and i love the game bioshock so much.