No Cheating or you Die

"Reach Round 100"

- BATTD description

 is a hidden achievement in Bloons Adventure Time TD. It is unlocked when reaching Round 100, which is only available in Martian Games due to its endless rounds compared to the 75 round total of regular adventure levels. Completing this achievement rewards one Epic wish orb.

Summary
To reach an extremely high round that does not appear in a standard game, the player has to put their best effort and dedication to the trials and tribulations of seemingly endless bloon waves in every round. It is strongly recommended to reserve at least 3 hours of playtime and play on a device with enough RAM and CPU power due to the Freeplay Mode-like bloon sends that appear in higher rounds, and ensure that you only play if you can afford to have a long play session or have sufficient timeframes even to check in every so often while AFKing, as putting the device to sleep may interrupt its connection to the game servers and make it lose progress.

Tips

 * The best way to get this achievement is to play a Martian Games event with Send In The Clones (which allows placing infinite amounts of one character) without Powerless, No Trinkets, No Weapons, Back To Basics, or Deflation also being active.
 * In particular for Send In The Clones, make sure to have some high-end weapons and trinkets equipped to the character you are using so they can cruise many early rounds and have enough power to sustain extreme late rounds. Use powers if needed. Note that Abraham Lincoln's Penny and Dimension Disruptor guarantee skipping up to three rounds.
 * If the player wishes to AFK, they can use Monkey Farmer to eliminate the need to constantly look at the screen and collect dropped items such as in-game cash and wish orbs. Using a character setup that does not rely on micromanagement is very important, since activated abilities and powers cannot be automated in any manner. With both Auto Start and Fast Forward on, the player can get high rounds with as little amount of time possible.

Trivia

 * Along with other Martian Games achievements, this achievement is not in the Steam achievement list, but is still in-game.