The next Bloons Tower Defense game will have a level of Special Agents that is higher than Pro. This level will be known as "Epic". After the Pro version of an agent has been unlocked, it will be possible to unlock its Epic version by using it in many more games (generally at least 50 more games after Pro has been unlocked). Once the Epic version of a special agent has been unlocked, you may choose to purchase either the Pro or Epic version - the Pro version will still keep the original price, but the Epic version will be more expensive (since it will usually be extremely powerful).
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