Tested this, & it's a long but enjoyable journey. There's no crash at all during my play twice. Bot navigation is fine. Supplies are enough, & even there are good weapon in the beginning of map 1. Highlights & directions are clear enough, though some areas have tricky paths hidden at the corner. . Map 1 is about exploring through buildings. Probably on 1st play, some players will feel confused for awhile when looking for the paths after the labyrinth garden, but if they search more thoroughly, they'll find the way. There are some explorable rooms here. . Map 2 takes place at subway. There are some abandoned trains & tunnels to pass. Some paths are also little tricky but they're not that confusing to find. . Map 3 is inside a closed mall. The paths here are also clear. There's a room with weapons & melee weapons. Some areas are explorable, including the area near the holdout event during waiting the blocked path to be opened, so there are some good spots to camp during the event. On this map, there's a tricky ladder that hidden somewhere. It took me several times to explore slowly until I found a way to climb up, the hidden ladder. . Map 4 has no problem either. The only tricky path is when survivors go down to the road & look for a way to go through the blocked path. I got stuck there for minutes...until I let my bots walk on their own & they found the path only in seconds. & it's a tricky ladder again that could be missed during roaming around. . Map 5 or the finale has the tricky rescue unit. The area is wide enough to get some good places to camp. After 2nd tank is dead, the rescue time is triggered. However, there's no indication of where the rescue unit will appear, at least until few seconds have passed. So in other words, one more additional tank will appear during waiting to figure out the rescue unit. But players can trick this out by exploring the area first before turning on the radio & switch, to predict where the rescue location may take place. . In short, it's a long but fun campaign, playable with bots or with other players. One of good old campaigns, I think. & there's still the next chapter of this campaign, but I'll review that one later when I have time again.

Epic

PROS + Challenging + Limited supplies, but exploration is key + Decent signs to show where to go + Smooth and well optimised CONS - NO rescue closets ever - Map 3/4is waay too long OVERALL Decent campaign that is FINISHED (something rare on l4d maps) but drags on for too long making for monotonous gameplay.