You're Losing Power!

You're Losing Power! is a special mission in which you must win rounds 1-50 while your towers keep getting downgraded. Every five rounds, your towers will lose one tier of upgrades (if the highest tier you've purchased is tier 1 or 2, you'll lose both upgrades, but if the highest you've purchased is tier 3 or tier 4, you'll only lose the one upgrade). If you haven't upgraded a tower at all, it won't be affected. If you complete this mission, you get $180 Monkey Money.