Newgrounds Rumble to get 100%
you need to do all challenges and story and doing to tutorial..
there is a bug by the way.. than placing a mine at the center of the map can hit the other player from about anywere. for instance..the map while playing survival.
last thing.. getting 5 or more kill on omfg diff on survival is easy, just stand at the center of the map on NG logo and jump to the right edge when a enemy is near you, if the enemy is close enough he will jump rought after you and fall into the hole.
do this till he got no life and kill him, i made 13 kill that way.
fun game