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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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: 159,059 • soi.vpk (67MB)
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An average campaign, where the finale is easier than the previous map.
By HulkTank
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.
By YuukiTouma
November 2013
Pros
- love the random special infected stuck in glass cages with some of them being able to break free from them; that also goes for the melee weapons
- navigation is really good
- environment is not too bad
Cons
- at the elevator panic event, the elevator takes too long too come
- the finale isn't as good as I expected it to be; too plain and boring
Average. Hopefully this campaign can be modified to be more interesting and fun. But good work with the SI and the witches in the cages, it's fun to look at them and kill them.
By IndraEMC
March 2013
Pros
*it's working
*no bugs that made game crash to desktop
*humor on second map, especially Louis face
*rabbit, i love rabbit.
Cons
*dull map
*too hard, especially "waiting for elevator" part, it's almost impossible on single player, because bot are useless, too much special infected, charger spawn almost every 10 seconds.
Play this if you're bored playing official campaign.
By Cursealot
November 2012
Pros
-Awesome map
-Funny infected
-witches in cages Fun to kill
Cons
-Chapter 3 elevator is too hard on advance and expert
-Finale no campspot really
-Finale Quite hard on advance and higher diffculties
-Nice map fun to play
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