Very creative and cleverly made

Took some time but Finished on Expert with the Bots.
I haven't seen a creative campaign like this for a long time.

map 1: nothing to add, fight on a plane with crazy boomers, fun.

map 2: You will need to be Rochelle here. alot of specials to deal with, but if fast you can grab all the cards in one go. and use rochelle for the finale one
you can just die as it counts as a checkpoint. (btw the checkpoints idea are very clever and creative too.)

map 3: fun little jumping section, the real danger is when two tanks spawn.
but if you time it right you can deal with 1 tank with the other tanks rock.(or just fight with bots)
I thought it took some time but it was luckily on my first attempt.
(I already played it once with a team mate)

map 4: Fun boat section, the valve part was a bit of pain, but you can use the bots for cover.
and also stay at the back of the boat to break the tongue if lucky. sometimes it does't work.
but make sure you keep holding the wheel when you hear one, can take several attempts.
or use the melee to cut tongue, but its hard to do when your using the steering. 

map 5: this took some time, because of many fast charger and instant deaths. also the end fight is no joke.
map 6: alot of custom tank/witch models, luckily they do not have many hp and can be killed.Few traps here and there.
Map 7: The big sis boss, just stay most left corner and try to avoid the rocks jumping. they instant bring you down
on expert.

Total time it took around 7/8 hours over 2 days and died alot of times especially from fast chargers.. 
I uploaded a video too, its on my Yt (Left 4 Dead 2 - Glubtastic 4 EXPERT)

and also really hope for more in the future. I had a blast playing.
Thanks

Review/ Guide

I can see why some might hate this, but its not impossible. done with bots and another time with 2 player on Expert, And i Quite liked the challenge, its similar to hehe 1 and others.

Map 1 -Is just rush and pray, 2 tanks spawn down the ladder, you can wait till they die, and after tunnels wait for the tanks to spawn and climb then rush and avoid a few rocks.
Map 2 You can return to the save room at the start, afterwards just rush. attract 2 tanks down before going up.
Map 3 Nothing much, only a few zombies to deal with going upwards.
Map 4 The easy way is to hide in the Container and all the tanks die, The hard way is rush and pray and be careful for falling stuff and rocks, both ways I have done
Map 5  A street walk with many alarm cars and ocasional tank,I also hit the fake saveroom door because why not^^
Map 6: Takes a little thinking, You can easy avoid the traps when careful. and after the boomer traps you can attract the tank spawn at the end of boomer walls then return  and lure it back down at the boomer jumping pad, and he will stay down, or if lucky in my case the tank hit the "wall boomer" and dies.
afterwards little platforming and then activate the door and stick to the right, then lure every tank back, also the ones in the end,  then you can safely finish the map.

I also recorded it, you can see the "Guide" or whatever over here YT  /watch?v=q4wFChcRvEQ       (starts around 1 minute)

Block2

Thanks for making this campaign Chenchen,  Finished solo with bots,

The only thing I want to say is that I did not like map 4 with the wall of blocks, its just frustrating every time you start the level. and also breaks the flow of the level.
Just keep it flowing like the rest of the levels, like the Hehe series, they have a nice flow and rush. With 2/3 more player is much easier tho, It was better to give player autoshotgun instead of different spawns, because we always restarted when there was no autoshotgun in map 4. also it goes much faster this way destroying the walls.
the finale compared to the other levels was a bit easy, Could add a little more difficulty.... , I hope you can do something with this information:) 
For this I can give 4 stars out of 5 (levels) Other then that I liked it very much, thanks
I made a video too in case you are curious /watch?v=rZNHHp3F63s

Greetings SpiritW