I've played this campaign with my friends, it's a fun campaign but has some challenging parts, especially chapter 2 and 3. At last part of chapter 2, survivors need to fight their way to the saferoom. And the hardest part of the campaign is the atrium in chapter 3, survivors need to defend against zombies untill elevator arrives, there will have large amount of zombies and special infected, so players must find the good place and take a good use of throwables to fight against zombies. Overall this campaign is really nice, level design is well and without gliches. Nice work!^^
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Source of Infection
Left 4 Dead 2
1.0 released. 4 maps. coop and versus. final version. Requires Left 4 Dead 2 Add-on Support.
Updated: 03/11/11 • Views: 178,221 • soi.vpk (67MB)
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Review
By ErrorUnknownGT
July 2020
Pretty decent campaign, only thing I'll recommend is that you learn to scale your maps properly so there isn't just a bunch of empty space, wide open areas. Oh and also, seems some maps have invisible melee viewmodels, can cause a crash if you somehow try to pickup a riotsheild. Other than that though, I had no problem with it, just your average Left 4 Dead experience, quite fun.
An average campaign, where the finale is easier than the previous map.
By Alex_D_Vasilkov
January 2019
First we have a Bus Stop Maze of Buses, then a "museum" with some funny moments, then THAT ONE MAP, and then a finale in some weird random cave structure. In the museum, the melee weapons are bugged, and can crash the game when picked up. The third map offers the most teeth-grinding challenge of the campaign: you're basically in an arena with little to no cover, infected are attacking from all sides, and the elevator takes MILLENIA to arrive. And when it does, and your teammate(s) is (are) downed outside, you CANNOT just leave them behind, you MUST pick them up or kill them outright. The bots are particularly pathetic: when they're attacked from every side, they just stand there, losing hitpoints. And then you find youself in an odd cave (is THAT the Source of Infection?) and after the usual waves, a long run to the military chopper.
A bit hard but really fun.
By EricChang
May 2022
I've played this campaign with my friends, it's a fun campaign but has some challenging parts, especially chapter 2 and 3. At last part of chapter 2, survivors need to fight their way to the saferoom. And the hardest part of the campaign is the atrium in chapter 3, survivors need to defend against zombies untill elevator arrives, there will have large amount of zombies and special infected, so players must find the good place and take a good use of throwables to fight against zombies. Overall this campaign is really nice, level design is well and without gliches. Nice work!^^
Review
By ErrorUnknownGT
July 2020
Pretty decent campaign, only thing I'll recommend is that you learn to scale your maps properly so there isn't just a bunch of empty space, wide open areas. Oh and also, seems some maps have invisible melee viewmodels, can cause a crash if you somehow try to pickup a riotsheild. Other than that though, I had no problem with it, just your average Left 4 Dead experience, quite fun.
An average campaign, where the finale is easier than the previous map.
By Alex_D_Vasilkov
January 2019
First we have a Bus Stop Maze of Buses, then a "museum" with some funny moments, then THAT ONE MAP, and then a finale in some weird random cave structure. In the museum, the melee weapons are bugged, and can crash the game when picked up. The third map offers the most teeth-grinding challenge of the campaign: you're basically in an arena with little to no cover, infected are attacking from all sides, and the elevator takes MILLENIA to arrive. And when it does, and your teammate(s) is (are) downed outside, you CANNOT just leave them behind, you MUST pick them up or kill them outright. The bots are particularly pathetic: when they're attacked from every side, they just stand there, losing hitpoints. And then you find youself in an odd cave (is THAT the Source of Infection?) and after the usual waves, a long run to the military chopper.
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