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Killing them only nets you 10 points, even with headshots or knives, so the best plan is to avoid them until the generator is finished, as they will be killed instantly when it’s fully powered. Once activated, you have to stay in close proximity to the generator while they power up, but glowing blue zombies will spawn to try and stop you.
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This means paying 200 points on solo, 800 with a full team of 4. You have to pay 200 points times the number of players to start the generators, which are activated by a panel on the side of them. There is no universal switch to turn the power on for Origins, instead there are 6 generators placed around the map, the first of which is in the spawn room.
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