: Version 18.0 introduced new maps, but players frequently use the "long feature" of the Map Editor (introduced in later versions) to create custom paths. The longest possible path is achieved by dragging path nodes diagonally across the map to maximize travel distance; a single Red Bloon can take approximately 8 minutes to traverse such a path.
: This is the primary "long feature" of the game. After defeating the final round of a standard game mode (e.g., Round 80 for Hard), you can enter Freeplay. This mode is essentially endless, with bloons becoming increasingly faster and stronger ( MOABcap M cap O cap A cap B Bloons TD 6 18.1.2747
health and speed scale significantly) until your defense is eventually overwhelmed. : Version 18