Pros:

- Very cohesive theme
- Unique Melee Weapons
- Fresh and surprising events
- Multiple paths
- Balanced map lengths and item placement
- Atmosphere adds a lot 

Cons:

- very tight finale space can be frustrating

Conclusion:

Blood Tracks is another campaign that feels very professional and polished. It feels like an official Valve campaign that you will get in a custom campaign. 

It stays close to it's train tracks theme as possible, and it pays off. Although I will admit that the maps could've used a little bit more variety in atmosphere. Still I was extremely impressed with the creative ideas that came out of building a campaign around this concept. 

There is a low to explore and check out in the maps. You will have a lot of fun. SO give it a chance and check it out.

Pros:

- Great attention to detail
- Multiple paths make for fresh replays
- Interesting and unique events
- Great atmosphere, lighting and 
- Exploring is both rewarding and interesting
- Balanced map lengths
- Survivors use relevant dialogue
- Feels like an official campaign

Cons:

- none

Conclusion:

Truth is that this is one of the few campaigns that actually feels like it could be an official Valve Campaign. 

The campaign is filled with unique environments, from dark forest paths, to abandoned mansions, to old catacombs and mines, making your escape at a coastal town. Unique events that you will want to play through again and again. The multiple paths may be a bit confusing, but even if you get lost in the maps you will still be entertained as every path has lots of interesting details to be wow-ed by and left in awe. More observant players will appreciate the signs and visual clues that guide you through a map. 

Basically the final line is that your time will be well spent playing this campaign. 

Pros:

- Scripts and AI navigation work well
- Objects are well places, not too many snagging issues
- Balanced item placement

Cons:

- Not a lot of variety of spaces, mostly open spaces
- Very little makes this campaign memorable
- Barely any visual clues to guide players
- Styles mishmash, sometimes it feels like Europe...
- Little reward in Exploration

Conclusion:

For a campaign that is rated 3rd highest currently on L4Dmaps I was left feeling underwhelmed. 

I've played through Blood Tracks, I Hate Mountains, One 4 Nine, Questionable Ethics... ect. How this campaign is up here confounds me. 

There is little change in atmosphere or environments from one map to the next. All the spaces are for the most part very open, with very little choke points. Multiple paths are few and for the most part unrewarding... you don't feel as though you got a different experience out of taking a different way through a map. 

There was very little here that stood out from the regular Valve made campaigns. The events are pretty static and predictable (waiting by a large gate while it opens?), with little that actually makes you want to come back and experience it again. Not to mention that there is little that guides you around the maps... often when played with friends people get lost trying to get a feel for a level... and it's not the rewarding sort of exploration where you find some neat visual piece. 

As far as the Eastern European theme, well there was very little that left me feeling like I was in another country. Most of the time I felt like the campaign just mashed together random elements from pre-existing Valve campaigns. If you are looking to be taken to another country in a Left 4 Dead map, play a campaign like Yama, where you get unique structures, and buildings which are actually based on the country they are from. 

Tour of Terror is not a bad campaign though. Everything works, and a lot of care has clearly gone into it's design. It's a lengthy campaign (although somewhat repetitive feeling) and is surely well made when compared to some of the unplayable messes out there in the custom campaign community. It's simply just an average map, and doesn't do much to stand out from pre-existing Valve made campaigns. 

Just don't go into this campaign expecting it to be like some of the Featured Campaigns.