Poltergeist Recharge speed - 2 levels, 25% faster and 50% faster cooldown time between shots. 5,000/10,000 points
Poltergeist Force - 5 levels, 10% more force applied to the poltergeisted prop/player per level. 1,000/2,500/5,000/7,500/10,000 points
Poltergeist Chain - Anyone killed by one of...