Arenas Of Tanks

There are 5 challenges in Autumn Ruins:

* Collect 1000 Scrap Metals - just pick up the scraps dropped by defeated enemies. 4 or 5 should be enough
* Defeat 2 Waves of Enemies - each wave is 2 enemies each, so just defeat 4 easy tanks
* Collect the Orbs - this is kinda like Pac-Man. You can clearly see all the orbs on the map, just collect them all while avoiding the enemies and bullets, as you can't fire back in this one
* Survive the Wave with 1 healh - as it says, just survive one wave of 3 tanks with one health, so without getting shot once. Pretty easy as long as you are acurrate with your first shot and don't let them get one off
* Destroy the Boss Tank - This is actually a pretty easy one too, but perhaps harder than the rest. Just keep moving and firing, he will take around 15-20 hit to go down