More zombies have been killed in the campaign Dark Carnival than the entire population of California, population 36,756,666.
That is almost more than the entire population of Northeast (US), population 54,924,779!

c2m1_highway

Difficulty	Playtime	Points (PPM)	Kills	Restarts
Normal	11.78 months	16,812,612 (35.39)	8,617,371	10,271
Advanced	3.34 months	13,070,411 (96.92)	1,865,034	3,243
Expert	8.57 hours	22,790 (44.34)	4,771	44
Total	1.26 years	29,905,813 (48.99)	10,487,176	13,558

c2m2_fairgrounds

Difficulty	Playtime	Points (PPM)	Kills	Restarts
Normal	11.21 months	15,425,399 (34.14)	10,175,061	3,978
Advanced	4.06 months	17,223,408 (105.11)	2,605,889	1,101
Expert	5.05 hours	11,045 (36.45)	4,075	15
Total	1.27 years	32,659,852 (53.02)	12,785,025	5,094

c2m3_coaster

Difficulty	Playtime	Points (PPM)	Kills	Restarts
Normal	8.14 months	11,575,117 (35.28)	6,143,636	2,813
Advanced	3.76 months	16,937,336 (111.67)	2,011,471	573
Expert	8.35 hours	17,595 (35.12)	6,516	42
Total	11.91 months	28,530,048 (59.41)	8,161,623	3,428

c2m4_barns

Difficulty	Playtime	Points (PPM)	Kills	Restarts
Normal	6.51 months	11,149,206 (42.45)	7,095,673	1,283
Advanced	2.83 months	14,789,253 (129.75)	1,970,134	307
Expert	3.42 hours	8,492 (41.42)	3,592	17
Total	9.35 months	25,946,951 (68.86)	9,069,399	1,607

c2m5_concert

Difficulty	Playtime	Points (PPM)	Kills	Restarts
Normal	11.38 months	12,481,105 (27.20)	5,905,802	9,823
Advanced	4.72 months	20,619,770 (108.24)	1,559,357	1,620
Expert	2.30 hours	4,459 (32.31)	1,483	5
Total	1.34 years	33,105,334 (50.98)	7,466,642	11,448

• Top 10 Players