Alright, there is a lot of stuff here:
So, there is a variable in the game called "score_to_drop" that is given by:
The amount of players * Starting score + The variable "zombie_powerup_drop_increment"
"zombie_powerup_drop_increment" equals to "2000" at the start of the match.
Then, it puts the global score (the TOTAL score of each player) in a variable called "curr_total_score".
Then, if this last variable > score_to_drop = Drops a power up (then it multiplies the zombie_powerup_drop_increment by 1.14 but meh)
Basically, the more you go far in the game, the more points you need to get for a powerup to come, the less powerups you are going to get. Easy nuff?
On the internetz i found a tool to calculate how many points you need to get the next powerup :
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All theAlright, there is a lot of stuff here:
So, there is a variable in the game called "score_to_drop" that is given by:
The amount of players * Starting score + The variable "zombie_powerup_drop_increment"
"zombie_powerup_drop_increment" equals to "2000" at the start of the match.
Then, it puts the global score (the TOTAL score of each player) in a variable called "curr_total_score".
Then, if this last variable > score_to_drop = Drops a power up (then it multiplies the zombie_powerup_drop_increment by 1.14 but you probably meh)
On the internetz i found a tool to calculate how many points you need to get the next powerup

:
You must login or register to view this content.
Don't quote on me that, but i'm pretty sure that the camping/running around does not affect at all the powerup drops, however, i reccomend to kill all the zombies when they are INSIDE the map, because it will never drop a powerup when you cannot walk (Behind the windows, and crap).
Exhaustive nuff?