BEATING LOKI: Use the Odin ship with the Excalibur weapon and dodge/shoot until "device overdrive" special is charged. Then abuse Odin's invulnerability to get to 200k chain so you score 50%+ bonus to special when invul wears off. Survive until you can fire special a second time. That last special should get you past him. To unlock Odin, beat lv20. To unlock excalibur, beat lv19 with only the first weapon (not as hard as it sounds with upgrades - if you need easy gold, play lv16 over and over). IF THIS HELPED COPY-PASTE AND KEEP IT ALIVE.
Thanks for the comment!
tough at first but once you get past wave 4 or so it gets easier and easier and if theres ever a sequel it should have an option to buy new guns for your character as well
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