Choose the Quickmatch > Headhunter. Headhunter requires you to collect a number of heads and score them to gain points for your team. To get the heads, you need to kill an enemy so they drop a head (or heads if they are carrying more), rush over an pick them up as quickly as you can or you can snatch them from other players. This is a very aggressive game mode. Best way to do this is play as the Scientist, since his vehicle mode allows him to fly and he is the fastest character. Fly around looking for some enemies that are carry 2 or more heads at once (it will be displayed above their name). Follow them and kill them. Once you have picked up a head, your position will become visible to all players on the map. So be very quick and fast on the trigger.
NOTE: You may use your vehicle mode to capture and carry heads.
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