In pole position Trophy
In pole position
Make the most kills of both teams in an online game session.
This one might be hard for some, but definitely do-able. As it says, you need to have more kills than anyone else on both teams (which is 5 other Awesomenauts). The only kills that count are from enemy Awesomenauts, not droids and/or creeps.
Note: If you're really having trouble with this then look for boosting partners here: Co-op Partners Thread (Read First Post!)