- Nice unique ideas and surprises

- Challenging puzzles necessary for level progression (for those who like them)

- Each map is in a completely different area

- Challenging events

- Lots of ammo, kits, grenades, guns...

- Too. Damn. Long. It was tedious and started to really annoy us.

- Maps are unnecessarily long and complex.

- TOO many kits and grenades

- Do NOT play with AIs -- don't even bother, they will get killed non stop.

- Some areas not well marked out (ie a couple instant death areas that looked like it was the way to go).

- Some steam blockades caused instant death.

- Textures were dull and repetitive; felt stale after the first couple maps.

- Logistics: I don't care how strong an air vent fan is, it cannot push four people down and around corners in 60 ft or so of piping.

- Textures: some textures and elements seemed very out of place, inconsistent. It reminded us we were playing a mod and not official valve content.

Overall, the unique aspects made this entertaining (especially the moving cart, it was hilarious to watch the zombies and even a witch get bulldozed and instantly killed on impact). I like puzzles to some extent, however the puzzles and map lengths were unnecessarily long and arduous, it took away from being able to enjoy the game. Would work better in a horror-based survival game as opposed to a FPS.

-Original and unique
-Some appealing visual elements
-Challenging crescendo events
-Puzzling level progression
-Nice custom elements
-Half-life 2 correspondence
-Lengthy maps, though others may list that as a con
-Memorable
-SO CHALLENGING, WHICH LEFT 4 DEAD NEEDS!! LOVE THE CHALLENGE! BRING IT ON!

-Environment and atmosphere was a little stale
-Scarce amount of supplies (Though, I enjoyed it as it brought a unique challenge, but could be irritating at times).
-Some graphic and texture issues
-Some glitches and bugs:
*One I can point out is a glitch with the 3rd map. Once the team dies it spawns you to the end safe house, so I never really got to experience the 3rd map fully.
-Bot navigation can be quite irritating
-The mapping seems a little rushed
-Finale is ambiguous (Though it was VERY fulfilling to complete it. However, I do recommend it to be shortened)

I realize this campaign has some mixed reviews, but I personally enjoyed it. If you are looking for a basic left 4 dead campaign and just want a quick play-through, you may be disappointed with Claustrophobia. I played it with just my boyfriend on Hard Eight advanced until we beat it; which ate up a lot of our weekends. It is challenging, puzzling and unique. Of course, it may be TOO difficult at times but completing it with just my boyfriend and I and one bot was quite the fulfilling achievement, and getting through the finale was quite a troublesome obstacle to overcome. I have to give it a fair rating as I did encounter MANY problems, but it was still one of the most enjoyable campaigns I have ever experienced, not to mention THE MOST challenging. A bias rating would be about a 9.5.

My boyfriend and I share some charitable memories because of this campaign!! Nice work. :)

- I like the Puzzles (as I enjoy Puzzles) finding the keys and such.
- Enjoyed some chapters of the map
- Kits
- Pretty well map designed
- Nice garage surprise idea
- Half-life

- Finale (It's like every 10 secs, Specials and Horde comes + why is the cans so far away from the car?)
- Reaching the actual task to start the Finale took quite long, would be better if it was shorter.
- Who makes a room with 999999+ guns and etc to cause the game to crash every time? What IS the point of that?
- Lack of Instructions
- Too much Kits but not enough ammo pile
- The part where you ride along the railway: it gets stuck if the zombies are on the way, would've been better if it could run them over (I found it stupid that it could run over the witch yet not the zombies, how does that even work? Seriously.)
- Specials get stuck at some parts (Can't really remember what Chapter)

Most annoying finale EVER played however, I did enjoy the Chapters before the finale and it was quite of a challenge to play this Campaign.

-Original and unique
-Some appealing visual elements
-Challenging crescendo events
-Puzzling level progression
-Nice custom elements
-Half-life 2 correspondence
-Lengthy maps, though others may list that as a con
-Memorable
-SO CHALLENGING, WHICH LEFT 4 DEAD NEEDS!! LOVE THE CHALLENGE! BRING IT ON!

-Environment and atmosphere was a little stale
-Scarce amount of supplies (Though, I enjoyed it as it brought a unique challenge, but could be irritating at times).
-Some graphic and texture issues
-Some glitches and bugs:
*One I can point out is a glitch with the 3rd map. Once the team dies it spawns you to the end safe house, so I never really got to experience the 3rd map fully.
-Bot navigation can be quite irritating
-The mapping seems a little rushed
-Finale is ambiguous (Though it was VERY fulfilling to complete it. However, I do recommend it to be shortened)

I realize this campaign has some mixed reviews, but I personally enjoyed it. If you are looking for a basic left 4 dead campaign and just want a quick play-through, you may be disappointed with Claustrophobia. I played it with just my boyfriend on Hard Eight advanced until we beat it; which ate up a lot of our weekends. It is challenging, puzzling and unique. Of course, it may be TOO difficult at times but completing it with just my boyfriend and I and one bot was quite the fulfilling achievement, and getting through the finale was quite a troublesome obstacle to overcome. I have to give it a fair rating as I did encounter MANY problems, but it was still one of the most enjoyable campaigns I have ever experienced, not to mention THE MOST challenging. A bias rating would be about a 9.5.

My boyfriend and I share some charitable memories because of this campaign!! Nice work. :)

+ Half-Life hues
+ Absolute "Claustrophobia" (it was TIGHT)
+ Considerate facilities(little elevator, ladders and such)
+ Ample supplies(medics pills adrenaline shots, special ammo packs)
+ Surprises like two tanks in one setting
+ Director's care everywhere.

- Room decoration
- Mapping(It seem to have been done in a haste)
- Order of clues(Lack of instructions)
- Lack of ammo displays in the finale
- Insipid. Not the best of all the research campaigns Ive ever played)
- Lousy ending
- Zombies spawn everywhere(even behind your backs sometimes)

To "Claustrophobia":
This campaign is something we've waited like many many many months since it's posted in here. But apparently it's done in a hurry. I'm sorry, first for once what happened in the comment area before Mr. Fleshybutt is banned, which might be a main reason why the work turned out like this. I expected more, from the screenshot, then what it is now. For mapping, 6(finished)+2(length,details); For experience, +0.5(nothing fun actually) Deduction -0.5 (for the haste.)
Mr Director, you said 10 will do in single player, but when I filled that car with 10 gascans, the car never got started.

*Trap elevator was sick
*falling body on map 2 was a great idea
*well designed and pretty detailed reactor environment on map 3
*Captured perfectly the half life 2 spirit
*Mental hospital was a great idea
*Ample amount of supplies
*Map 5 was epically clever,fun and well designed really
challenging your searching and logical skills
*TRAAAAAAAAAAAAAAAAAAAAAAAAIN <3
*"garage surprise" at the finale was awesome
*the canyon trip at map 7 was fun and very detailed

*The cafeteria key on map 2 wasn't in a good place and
took me a long time to find (should have put it in a room)
*camera on map 1 wasn't good
*Tank spawning on map 1 before we get the weapons
* The railway at Map 5 seemed really unfinished, should have
put more crashed trains
*The train should kill the zoombies instantly when he runned them over
instead of getting stuck into them
*FINALE is !@#$ing IMPOSSIBLE play'n with bots in any difficulty above easy.
i played it on normal and when i got all the 16 gas cans around the car an unstoppable
wave of tanks started making it impossible to fuel even under the effects of adrenaline

An excellent,creative and fun puzzle themed campaign FULLY reccomended to all half life
fans and all players who want a campaign that challenges not jus't your aim and
teamwork but your logical skills.

The questing for keys and whatnot was fun and refreshing. Not just a point and shoot campaign.
Nice detail, and interesting maps. Lots to look at and get distracted with.

The sewer maps were too long, and get dull if playing one person with three cpus.
Easy to get lost, and not enough hints of where to go. It's fun to have a little mystery, but once frustrations sets in it stops being fun.

I didn't find the number of specials, or the difficulty at the end, to be that much of a problem. In fact, I found the extra challenge a lot more fun. There are a *lot* of specials.
Overall, this is one of the best maps I've played and it's in my regular rotation. I skip the sewer levels, only because they get dull with the long distance fetching, otherwise it's very fun.

Detail was nice.

Way too many special infected
Way too many special infected
Way too many special infected
Way too many special infected
WAY TOO MANY SPECIAL INFECTED!!!! ESPECIALLY AT THE FINALE!!!
On top of WAY TOO MANY SPECIAL INFECTED, this was downright frustrating.
Too much unnecessary elongation with fetch quests
One of the biggest signs of a bad map is too many damn long, bland, straight tunnels.
By the way, did I mention there were too many special infected?

Aside from the final being complete and utter crap with TOO huge an area, gas cans spread WAY the hell apart, and too many damn special infected, it was.....meh. This guy clearly focused on 'quantity' by making his maps huge, but didn't put enough time in quality.

+Well recreation of the Half Life mission.
+Great environmental scenery
+Large map or sewer with detailed design and layouts.
+So many places to explore and discover different items.
+Fun and challenging gameplay.
+Puzzle solving and item searches. Perfect map for team play and teamwork is essential.
+Traps!
+Cart rides! :D
+Custom props and items.
+Supplies are more than enough. Fits the gameplay and campaign length itself.
+Supplies and weaponry are in boxes! Cool.
+Bots are good but navs need improvements.
+The sewer environment and scenery somehow gives an eerie feeling.
+Finale is a blast!

-Please add some items or props in saferooms. They look empty.
-Bot navs as usual needs improvement
-Some guides on where to go can be useful and less time consuming
-Some areas look empty while some areas are packed. Its not balance.
-Infected spawn place needs improvement. They always spawn on expected places where players can easily counter them off.
-Some areas make players stuck.
-Despite the length of the campaign, finale is way to long and far to get too. Its almost like not a finale map.
-The high voltage on the cart tracks ca be quite annoying with low health.

Cool great sewer, I mean campaign with fun and exciting gameplay. Recommended playing with friends as it will get boring if play alone like lkl said. Hope to see an update for this great campaign and also hope to see more from you, good sir. Thanks for this campaign. I had a blast

'Half-Life' anything is always a plus.
Great environments. Lots of variation.
Plenty of supplies of everything.
Plenty of weapons and melee weapons.
Goodie boxes with supplies.
Bots are great shots.

Empty safe rooms.
Bots get stuck too much and aren't helpful most of the time.
No directional arrows.
Confusing areas with no directions.
No directions for getting items.
Too much of the back-and-forth with switches and keys; slows down the game too much.
Too many maps.
Areas are a little larger than needed.
Open spawns of hordes.
Too many hordes at times especially when no switch is hit or item picked up.

I'm biased since it's using Half-Life maps. It's fun but very tedious. The bots aren't always helpful and there are far too many back-and-forth tasks. All that running about while fighting horde after horde makes it exhausting. Having seven maps of the same repetitive behavior simply takes too much time. After all that there's the scavenge ending with far too many cans in areas that are too far from the car. There's simply too much thrown in for the sake of throwing it in. Less is more.