Odyssey Mode (BTD5)

Odyssey is a game mode for Bloons TD 5 Mobile. It was first released on the Version 2.15 update. Odyssey Mode can be accessed via the main play menu.

Description
Every week the developers at Ninja Kiwi choose a set of maps to challenge a player. In the beginning, the player can choose their difficulty. Higher difficulties mean bigger and better rewards. The player must complete all the maps in the chosen difficulty in order with a single set of lives for all the maps to complete the Odyssey challenge.

In each difficulty, the maps are in order, with the easiest maps coming first and the hardest maps coming last. There are three maps in Easy Odyssey Mode, four in Medium, and five on Hard. The first map will guaranteed be a relatively easy Beginner Track. Maps in between may be of any Track Difficulty, with harder tracks being placed in harder difficulties. The final map will always be Intermediate on Easy, Advanced or Expert on Medium or Hard. Occasionally, Hard Difficulty Odyssey may have one Extreme Track as the final map.

If the player loses all lives at a point during any map in Odyssey Mode, the player will have to restart the entire Odyssey unless a Continue is bought (which costs 500, as with other games).

Rewards
These are the rewards for completing an Odyssey challenge. The Agents rewarded upon completion will all be of the same type with approximately 150 of value.

Note that if the last track was Extreme Difficulty, which only is the case in Hard Odyssey, 100,000 XP is gained additionally too.

The random agents rewarded will be all of one type per week. The amounts will also depend on the type too. In total, the Agents reward will be valued at approximately 150.

Trivia

 * The Odyssey is a reference to the Odyssey, a Greek epic by Homer describing Odysseus's journey.
 * The first map is always the same on all difficulties. The subsequent maps are all unique throughout all difficulties.
 * It is possible to restart a round by quitting the app when the player is about to lose or before the round finishes.
 * Support Chinook farming could be used to gain more health, easing the difficulty in harder maps.
 * In the Switch, PS4 and Xbox One versions of BTD5, Odyssey Mode appears in the Challenges menu, but isn't able to be selected, with the message "Odyssey Not Available" below the icon.