I am very frustrated as of this moment, I have had Battle Bears for about two months and I still cannot beat the Zombie boss. I swear that I have played the zombie level about 20 times and I have still not beaten it, can someone please help me on this issue?
Shoot continuously, move the crosshair between the two shots to hit as many enemies as possible. Try to cover one half with 2 shot and the other half with the next 2 shots. Rinse and repeat until all 400 or so are dead!
Aim for the groups, only target a single one if he is really close. Aim at head height, headshots are still better. Just keep blasting man, I dont know what else to tell you.