File:SZI Graph.png

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Original file ‎(1,438 × 501 pixels, file size: 134 KB, MIME type: image/png)

History of survivor (blue) and zombie (green) populations, October 2005 to May 2016. Dips and peaks correspond to notable player events (names) and game updates (numbers). Scroll horizontally to view full graph.

Date Range	Events	Game Updates
November, 2005	First Siege of Caiger Mall	(1)	Generators and Profiles added.
December, 2005	On Strike	(2)	Headshot takes AP instead of XP. Air drops are first observed.
December, 2005		(3)	Groans implemented.
January, 2006	Mall Tour '06
February, 2006	Second Siege of Caiger Mall	(4)	Tangling Grasp added.
March, 2006		(5)	Syringe nerf.
April, 2006		(6)	Ransack is added, and powered buildings increase search rates.
June, 2006		(7)	Zombies can now drag critically-wounded survivors. Scent Fear tweaked and ransacked buildings must be cleared before being barricaded.
August to November, 2006	Battle of Blackmore, Third Siege of Caiger Mall	(8)	Scenth Death buffed and flailing gestures added; binoculars added and knives buffed.
		(9)	Malton's first fog. Adjacent powered buildings highlighted, billboards added, bodies must be dumped individually.
		(10)	Forts are now functioning.
December, 2006 to February, 2007	The Big Bash, Mall Tour '07	(11)	Zombies gain XP for destroying barricades and machinery, and for ransacking buildings.
March, 2007		(12)	Museums have lootable decorations. Large items take more inventory space.
April to May, 2007	Battle of Santlerville	(13)	Clothes added.
June, 2007	Yahoomas
July to August, 2007	Battle of SantLUEville	(14)	Zombies can ruin buildings, which interferes with freerunning. Survivors need toolboxes to repair ruins.
December, 2007 to January, 2008	Battle of Pitneybank	(15)	Barricade interference added.
February, 2008	Monroeville introduced
March, 2008	March of the Dead, Big Bash 2
May, 2008		(16)	Decay and darkness implemented.
October, 2008	Borehamwood introduced	(17)	Flesh rot added. Zombies can eat dead bodies. Battles are bloodier and Mall FAK rates drop.
February, 2009	Mall Tour '09
July, 2009		(18)	Feeding groans buffed. The dark is darker. Emergency broadcast system added.
July to September, 2010	Escape, Big Bash 3	(19)	Last game mechanic update. Bellow added, and survivors can scout safehoues.
April to July, 2011	The Dead 2.0
October to December, 2011	Mall Tour '11
May to October, 2013	Big Bash 4

File history

Click on a date/time to view the file as it appeared at that time.

	Date/Time	Dimensions	User	Comment
current	01:53, 23 May 2016	1,438 × 501 (134 KB)	A Helpful Little Gnome (talk \| contribs)
	01:49, 23 May 2016	1,438 × 501 (133 KB)	A Helpful Little Gnome (talk \| contribs)	Spacing
	01:37, 23 May 2016	1,293 × 501 (126 KB)	A Helpful Little Gnome (talk \| contribs)	Added on a year. You can't even tell the difference.
	16:09, 9 August 2015	1,626 × 501 (144 KB)	A Helpful Little Gnome (talk \| contribs)	Removed some things. Maybe this will look better.
	15:53, 9 August 2015	1,158 × 357 (143 KB)	A Helpful Little Gnome (talk \| contribs)	2015 and a new ???. Unfortunately there is a smaller limit on file size, so this probably will look like crap.
	21:02, 1 June 2014	1,792 × 547 (226 KB)	A Helpful Little Gnome (talk \| contribs)	June update. More of the same.
	21:22, 23 January 2014	1,790 × 545 (188 KB)	A Helpful Little Gnome (talk \| contribs)
	23:15, 17 December 2013	1,790 × 545 (183 KB)	A Helpful Little Gnome (talk \| contribs)	Updated with corrections and additions.
	18:41, 16 December 2013	1,790 × 545 (181 KB)	A Helpful Little Gnome (talk \| contribs)	Updated with corrections.
	04:37, 16 December 2013	1,790 × 545 (182 KB)	A Helpful Little Gnome (talk \| contribs)	Updated. Now with labels.