More zombies have been killed in the campaign Cold Stream than the entire population of Illinois, population 12,901,563.
That is almost more than the entire population of Los Angeles-Long Beach-Riverside, CA, population 17,755,322!

c13m1_alpinecreek

Difficulty	Playtime	Points (PPM)	Kills	Restarts
Normal	1.91 months	3,500,256 (45.54)	1,364,474	479
Advanced	1.52 weeks	2,252,836 (146.61)	226,831	320
Expert	2.18 hours	8,505 (64.92)	1,000	19
Total	2.29 months	5,761,597 (62.39)	1,592,305	818

c13m2_southpinestream

Difficulty	Playtime	Points (PPM)	Kills	Restarts
Normal	4.09 months	5,676,479 (34.44)	3,344,229	2,022
Advanced	3.90 weeks	4,257,248 (108.26)	603,599	769
Expert	2.05 hours	3,355 (27.28)	1,373	12
Total	5.07 months	9,937,082 (48.64)	3,949,201	2,803

c13m3_memorialbridge

Difficulty	Playtime	Points (PPM)	Kills	Restarts
Normal	2.96 months	5,152,070 (43.18)	2,651,753	653
Advanced	3.24 weeks	4,804,858 (147.35)	597,458	250
Expert	0.00 seconds	0 (0.00)	0	0
Total	3.77 months	9,956,928 (65.53)	3,249,211	903

c13m4_cutthroatcreek

Difficulty	Playtime	Points (PPM)	Kills	Restarts
Normal	3.45 months	5,646,521 (40.65)	3,564,830	3,287
Advanced	3.73 weeks	4,486,308 (119.42)	598,474	399
Expert	1.27 hours	2,956 (38.89)	1,063	4
Total	4.38 months	10,135,785 (57.41)	4,164,367	3,690

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