OMFG :C I played survival and made the bosses health 390,000 and then died >.< It took me literally an epic 1 hour to get that far. Up vote this comment if you complete the boss, GOOD LUCK XD
This is a really good game I probably played this 20 times so far, agreeing with danhanman1 the should have made reload set onto r cause I just started swearing when I nearly completed a mission so I rate this game 4/5 stars :D