It's a challenging map if you play alone. I had a mod for better AI so they can pick up all kind of items and use them. They even helped build the barricades while I used the mounted minigun. Took me 6 resets to finally have a good strategy to survive long enough to escape by building that rocket piece by piece. I really enjoyed it even tho I was alone.

Reading the description about survivor players are recommended more than bots, I decided to try & prepare a portable sentry mod from an author here as a replacement for survivor players while at the same time checking the playability. I took like about 36 minutes because I built some unnecessary things too to crowd the place lol. Actually bot navigation is fine, but they're not much of help as most features here require players to operate. In other words, the more players are in, the faster it will be to finish the campaign as more players will make it possible to do multi tasks at once. Besides the environmental building spots, there are some features about item creator machine & a machine that calls area support that protects survivors for awhile. . & then about building things, some strategies are needed. Survivors may choose to build some barricades first, but building weapons & recovery items are necessary too, especially because after certain minutes have passed, a tank will appear so weapons with good firepower or molotov/ gascan is needed to handle the tank. In my play, I decided to unlock smg & then rifle first, & then medkits afterwards. The item summoning process is quicker than the item unlocking process, so it's kind of helpful. After getting the desired items for defense, it's time to build. If all 4 survivors are players, multitasking while defending strategy is good. For example two players stay alert for zombies while the other two are doing multi tasks. Or if the team is confident enough with the skill, having 1 player staying alert & the other 3 doing multi tasks is fine. . Then, now it's about the building objectives. There are 3 main objectives: filling up the gas, making a bridge, & then making a rocket. The instructions are clear as there's a kind of banner that show what the next objective is. The length of building process varies on each environmental stuffs. It's long enough to make a special infected grab you, which is why survivor players are recommended, as they can cover & react much faster to zombies & special infected while the other one or two (or three) are building some stuffs. Certain musics will be played as indicators when survivors are close to finishing the campaign. . There are some drawbacks in this campaign to evaluate for the next updates. The first one is the background music. I think it would be better if a music is played since the first spawn, so that players can build while enjoying the music. I ever played another campaign about building stuffs & there's a background music so the building processes didn't feel too silent. The second & the last one is the rocket building process. There's no indicator or notification about how many remaining rocket parts are left, so players have no idea how long it will finish. It would be better to put some instructions closeby about the remaining rocket parts, just like the indicator on the generator about how many more gascans needed to fill. . In overalls, this good & playable, but not recommended to play in Singleplayer. If someone insists on playing it in Singleplayer, at least they need some supportive mods like automatic sentry turrets because bots alone can't handle the defense properly while the player is building something (well, everybody knows how annoying the survivor bots are if it's about defending & helping player getting caught by a special infected). But actually it will be more fun if played with players. The multitasking & people going here & there to build several stuffs at once, that's probably the main purpose of this campaign. So, make sure that you have at least one or two friends to join before playing this campaign for the best experience.