What about that when you complete an w-task,you can have a better w-task! It is much harder than the original w-task. Normally,the Vector has a Cobra collimator sight,but after the second w-task,he gets a silencer and a HAMR. The w-task is 20 prokills,but in the second one,it is 40 Quad Kills.
What about when you aim the fire extinguisher at the face of the ragdoll that the spray that comes out of it will slowly drain the whole ragdoll's health. It is called suffocating.
I have a suggestion. Gun levels! You have to kill enemies with a certain gun to gain EXP for the gun. You will get 10% less EXP for the gun than for the player. When you get to a level (eg. 20) you will get a certain thing (AKM lvl 20 = Gold Plating (+10 Damage and accuracy)).
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"Unbreakable" item property is planned, but there are some snags I have to work out first.