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Battle Hardened

Won 20 Arcade Mode Levels.

Battle Hardened0
3 guidesOnline/OfflineCooperativeCumulative +
27 Jan 2020 27 Jan 2020
0 0 0
When you connect a second controller, press start and pick arcade mode instead of cooperative. Enter a level with enemies, kill four with the account going for the win. Then exit the level to count as one win. You can bounce between two levels, getting three kills, then changing to the other level until you reach 20.

I recommend doing this in the Hell levels, because enemies respawn sometimes in those levels.