Great Bosses
Horde events are interesting
Originality left and right.
Custom enemies.
MY NAME IS IN THE CREDITS! (now if you would be so kind as to tell me how exactly i got in there i would be grateful because i don't exactly remember helping in any way)

It tends to get very frustrating and hard sometimes, even on the easiest difficulty

Overall, it's great and has a lot of things going for it. i'd advise playing it as soon as you can.

Traps
Suspenseful
The slide which takes you back to the saferoom if you press the wrong button
Witches/tanks trapped in cages but then open later
Disappearing floor

TOO MANY GOD DAMN WITCHES!!!
INFINITELY RESPAWNING WITCHES!

it was fun until Bunker part 2, those Unlimited Respawning witches pissed the shit out of me, i just ended up god moding past it, because it was pissing me the hell off

Interesting and Well-scripted bosses
Bosses are challenging without getting too tough for just one Player and 3 bots

Starts out Kinda Boring
Some of the Melee weapons are just a big "ERROR" sign
Shortest of all the Campaign Chapters
No Tanks or Witches

this has to be one of the best scripted campaigns, with a bunch of fun scripted bosses and events.(i say that because all maps link to the previous one, but i feel this is the one i had the least fun, the start was kinda boring, but the boss really brought things up, then after escaping i was totally not expecting the final boss face fight in space, i don't know where the story can go from here, but you can do it! i'm sure of it!

Interesting To have the L4D survivors in the L4D2 Campaigns

there are 2 sets of L4D Survivors in the Passing Campaign.

if your gonna swap the L4D2 survivors for the L4D Survivors ingame, switch the NPC Survivors from the Passing to the L4D2 survivors, which means you'll probably to pick one of the L4D2 survivors to die.

Ammo Piles Strategically Placed
Wide Variety of Weapons
Interesting Cresendo Events
Finale is Challenging and Fun(during it all my teammates were dead or incapicpated)
"Secret" Rooms(yeah, you know what i'm talking about)
Space Shuttle: AWESOME!!!
Environments were beautiful looking and varied in size

Can't Really Think of any, i mean, i may have gotten lost in the maps a couple of times, but that was mostly my fault
When looking at the water from above in the 3rd map, there is a reflection of a big, pink texture.

Overall, this is a really great campaign, and definitely one of my favorite community campaigns to date, second only to Suicide Blitz 2, after seeing the ending i think it would be awesome for you to create a Space Campaign and make it continue from this Campaign, it would be EPIC!!!

Instructions are Very Clear
Challenging

========== 1st Map ==========
Missing Skybox Texture and Missing Grass Texture Near Ending Saferoom( the default, pink texture replaces them, you know what i'm talking about
========== FINALE ==========
all four of the survivors were inside of the rescue chopper, yet the escape event was never triggered and the campaign never ended,

very fun and very interesting, but as i already said, the escape event never triggered, you might wanna fix that

Very Close to the Original Game(i have all the puzzles in the Forest Temple Memorized)
Custom Scripts Work Well(The Common Infected Matching the Ghosts in the Forest Temples, the keys, etc)

Finding the Keys is a big problem, i know where they are, yet i can't seem to find them after i do what is required to make them appear, you should really put glowing indicator lights(like how its displayed around first aid kits and stuff) around the keys so their easier to find, i had so much trouble finding the keys i had to noclip through all the locked doors.

really great map but the impossibility of finding the keys is the only thing that really needs to be fixed, put a indicator light around them like first aids and pain pills have.

Interesting Twists

Infected Shooting you makes it too hard because of the dumbass bots

i like it, but its way to hard.

Sonic
Sonic
More Sonic
how many times do i have to say sonic?

None

Sonic is Awesome but not as awesome as Mario

All Hail Shadow
Live and Learn
His World
Escape From the City

Reach For The Stars

Replace Reach For The Stars with a better song, thats it...

Big Map
Plenty of Camping Spots
A Really Good Glitch Spot(i survived in between 10 and 11 minutes using it)

Missing Textures, sorry, but a walking along a floor of missing textures just makes me feel nauseous and dizzy (It's Definitely not my computer, as i tried reinstalling the game and using verifiying the intergrity of the game cache, which restores missing files)
in one of the buildings the doors into the bedroom just show the skybox, once you enter the room the room appears and the hallway you were just in becomes the skybox, its like when you enter, the part of the map you were in disappears
Bots Get Stuck inside some of the Buildings
The Radio is silent, all you can hear are the survivors talking to the Radio(while no one responds)

Pretty Cool Map, but what brings it down is the missing textures and what i like to call the Disappearing Hallway/Rooms, i have a video which i'll be adding here soon