+Great story which takes place after first Zombotron events
+Missions are better organized than in the first game
+More enemies
+More weapons
+Better interface
+Vehicle with gun(very fun to kill with it)
+New characters
+Upgrades
+Awards for money and a secret image ;)
+Extras makes you try the game in other modes
+Stars and tasks
+Driving is much better now
+Hitting the head don't make you restart at last checkpoint
+Good graphics
+Great level design
+Funny
+Better boss battle
+Time trials are per levels
+Pants with 2 different colors and hats
+No more lag
+Constant updates