In BTD Battles Mobile, however, purchasing towers, their tier-3 upgrades, and their tier-4 upgrades are required to get the most of the use of towers. In this game, every tower, their tier-3 upgrades, and their tier-4 upgrades have different costs and Battle Score requirements.
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Exclusive to the Mobile versions, players who earn a certain number of medallions are able to reach the leaderboards to earn extra medallions as reward. Earning at least 100 is required to earn rewards from being in the leaderboards.
Rewards for reaching a certain placing in the worldwide leaderboards are as follows:
4th to 100th
Gold & Silver
101st to 1,000th
1,001st to 10,000th
10,001st to 25,000th
25,001st to 50,000th
50,001st to 100,000th
100,001st to 250,000th
250,001st to 500,000th
Since Bloons TD Battles Mobile requires internet, it also knows which country a player is from, automatically choosing which country's leaderboards a player is to be in. Some countries may have an advantage for having a smaller number of players, since adjustment for regional leaderboard rewards never change from country from country. Thus, someone from a smaller country such as New Zealand may get Top 1000 when in other more populous countries such as USA may only get Top 10,000 for the same amount of medallion gain, for instance.
Rewards for the regional leaderboards are as follows: