Harvester

The "Harvester" is a special machine introduced by The Phenotrans Corporation in Dead Rising 2: Off the Record. It is essentially a miniature version of the harvesting device seen in the Secret Underground Lab of the Fortune City Underground Tunnels. It serves one purpose, to collect queens harvested by zombies and gas zombies alike.

The inside of a harvester might be coated with Nectar or some chemical that can attract hordes of queens as dozens of wasps can be seen flying into the receiving ends of a harvester after their zombified hosts have been destroyed.

Off the Record
After Frank West storms and sabotages all Phenotrans operations in the Underground Tunnels, he takes the evidence he finds back to the safe house and presents it to Raymond Sullivan, Rebecca Chang, and Stacey Forsythe. Shortly after, Stacey reveals herself to be "Agent S" of Phenotrans and shoots Rebecca (although she survives in "Overtime Mode") before killing Sullivan.

As Frank peruses Stacey into Fortune Park and Uranus Zone, he stops short as several Phenotrans helicopters appear in the skies over Fortune City and deploy teams of Phenotrans security guards to safeguard about six or seven different "harvesters". Armed with merc assault rifles and blast frequency guns, the teams set to work trying to collect as many queens as they can before the commencement of the military firebombing.

Frank ends up destroying all the harvesters before they can reach full capacity. Afterwards he calls up Stacey and jokes that her plan has "gone up in flames." An annoyed Agent S rebuffs Frank's remark, and tells him to come to Uranus Zone where they can settle their conflict once and for all.

Trivia

 * The achievement "Technological Terror" can be unlocked by destroying one of these sinister machines.