Pros:

+ adds a bit of creepiness to nick
+ nice concept, should do it with the other survivors 

Cons:

- should be more detailed 
(in terms with the suit, should be ripped or more bloody but will not affect the final score)

Conclusion:

this is a great concept and i you should make this for the other survivors if you didn't already

Pros:

+ Good length for a campaign
+ Beautiful scenarios
+ Fun Play through
 

Cons:

- Not much, only that sometimes it gets confusing where to go

Conclusion:

This campaign is very fun to play with friends. The con will not effect the score because i feel that it forgives itself with all the fun it has in store

Pros:

+ Original
+ Long and Detailed Maps
+ Portal 2 Easter Egg!
+ New Custom Weapon included!
+ Epic Finale

Cons:

- I don't like the fact that the gnome keeps getting stuck when you drop it at the wrong time, ruining the chance of you getting to the Easter egg (for example, when you drop the gnome in the elevator in the first map, it goes through the floor)

Conclusion:

This campaign is one of the BEST and funnest campaign i have ever played, this really looks like an official campaign by Valve. For a custom campaign, this has to be the best, detailed campaign out there!

Pros:

+Pretty funny

+Has a lot of voice commands

+Lots of fun to use

Cons:

-Can get you kicked from servers :(

Conclusion:

This is a fun to use add-don, i highly recommend this