No Harvest achivement Guide - BTD6. Very Easy 

I did follow your guide until glue gunner. Went with 0-1-4 and then I upgraded monkey village to 5-2-0 After that I got glue 0-2-5, ice monkey 4-2-0 and a 2nd alch Finished with ice 5-2-0 and got the bomb 0-5-2 just in time for round 100 Monkey village 5-2-0 carries this run on all levels except 90+, for 90+ Catapult carries until 100. I do belive the cannon is still nessecary for 100, but I only had to use the rocket at 100

Its been a day ago sinds this was uploaded.

i got this on an odessey, it was chimps but i had 50 lives and not even 100 rounds. got the achievement ez