why assassins creed game need update patch

A lot of games that come out nowadays need patches to fix bugs and other issues.

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Assassin's Creed v1.02 Update

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* Fixed a rare crash while riding the horse in Kingdom
* Fixed a corruption of Altair’s robe on certain graphics hardware
* Cursor is now centered when accessing the Map
* Fixed a few problems with Alt-Tab
* Fixed a graphical bug in the final fight
* Fixed a few graphical problems with dead bodies
* Fixed pixellation with post-FX enabled on certain graphics hardware
* Fixed a small bug in the DNA Menu that would cause the image to disappear if the arrow was clicked rapidly
* Fixed some graphical corruption in Present Room with low Level Of Detail
* Character input is now cancelled if the controller is unplugged while moving
* Added support for x64 versions of Windows
* Fixed broken post-effects on DirectX 10.1 enabled cards

Well looking at the patches readme file is seems that it fixes a few bugs and compatiblity issues.

You can download it from various gaming related websites, but i've included a few links for you.

http://www.gamespot.com/pc/action/assassinscreed/download_6190909.html

http://files.filefront.com/Assassins+Creed+v102+Patch/;10210507;/fileinfo.html

http://www.gamershell.com/download_25796.shtml