I've tested several times, in Singleplayer & Coop. The campaign works well, with several tank challenges especially on map 1. The main problem is the bot navigation & the environments that cause damage. Bots are really bad when facing dangerous environments like lava & cars, so they die so often. The finale is kind of thrilling. You'll know what I meant when you reach the rescue time :D . . Pros= - The maps work well. - The supplies are enough. - The campaign is provided with instructions, highlights & guide arrows. - Nice campaign concept, especially about the oxygen mask feature. . Cons= - There are some invisible ladders. I added "missing content fix" mod from Mr. Rayman, but the ladders were still invisible (not pink & black, but totally invisible). Because of that, I jumped & took damage several times due to fall. - Bot navigation is troublesome when facing ladders. I forgot how many times bot had fallen to death during climbing the ladders. - There are some dangerous environments that instantly incapacitate or even kill survivors. Players have no problem in avoiding them as long as they're not reckless because the dangerous environments are still much easier than the traps in "Questionable Ethics" & "Power Station" campaigns. However, bots are terrible at avoiding those environments. For example, some bots will more likely die falling into the lava when jumping around following the players. & on map 4, the bots have 90% probability of getting incapacitated by cars that keep coming & leaving. I tested several times, & all tests resulted in only one bot surviving & coming with me. - There's a bug on a pipe that survivors use to climb after passing the moving cars if played in Singleplayer. I tested several times in Singleplayer & Coop. When testing Singleplayer, each time I tried to climb, I got pushed back automatically, regardless of which character I used. Meanwhile, when I tested in Coop by typing "map mapname", the bug was gone. However, bots had difficulty in climbing there & they more likely fell to death or walked away really far, back to the car route & then died after cars hit them. - Some buttons are not highlighted. Some elevator switches & certain button don't glow. For example, on map 4 after escaping from car route & then climbing the pipe, survivors have to defend while one of them is operating a switch. Then, there's no highlight after that, only a clue on the monitor about a confirmation to execute certain command. Survivors need to press a button there, but the button doesn't glow so that can confuse players for awhile. - The finale is kind of unfair. After last wave of tank ends & rescue time is triggered, survivors are still trapped for minutes in a cave while the panic event + tank + SI keep coming. . In overalls, for the best experience, don't play with bots here. Bots can survive only until map 3. On map 4, you'll be mostly alone or accompanied by only one bot if you're lucky, because most bots will die getting hit by the moving cars & the rest will be unable to climb the pipe afterwards. & if you insist on playing in Singleplayer, use Coop instead, either by clicking "Campaign" or typing "map mapname" on the console. That will solve the pipe bug on map 4.