Legendary Protector
Dude! You just completed the Legendary Protector achievement in Protector and won the Legendary Protector badge and 30 points!
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Phew!
4. After getting the TACK, you need more damage, so get more CANNONs at the crossroad. I got 6 of those in the end. UPGRADE the bigger bomb.
5. Get 3 ICEBALL at the crossroad. Place one that will hit the incoming right path as well. UPGRADE the longer freeze time.
6. Get 3 Boomerang monkey and place in a triangle on the map so that you will be dealing constant damage to the incoming balloons. Upgrade sonic boom for those near the iceball. Must upgrade the multiple hit.
Last of all, save enough money for monkey glue and road spike! They are your best friend, even at level 50!
Argh. Completed hard with 39 life. Boo. One more to the badge =*(
Anyway, for hard, here what i do.
1. Get CANNON and place at the crossroad. Dont upgrade anything at all until lvl 30. Some upgrades are useless so skipped those. I wont recommend u upgrade the range for cannon cos it will just aim other targets
2. Get TACK and place on the right hand side of the map between the two opposite path.
3. Get 6 - 10 TACK and place on the starting path on the left hand side. you will need those to deal constant damage to the balloons. No pt upgrading tack at all. I have 11 TACK in the end.