Deflation Mode is a special mode introduced in Bloons TD 4 Expansion and it has also come to every game after that excluding Bloons TD Battles and Bloons Monkey City. It is an endurance mode. In Deflation Mode the player starts out at round 30 (or 21 in Bloons TD 4 Expansion) with 50,000 money, but every cash generating method, namely, popping bloons, completing rounds, Banana Farm, Supply Drop and Cash Injection are disabled. Upgrades that can modify value of cash, or give more cash, but still have other effects, like Monkey Town, Bloon Trap and Support Chinook will have their cash generating effect negated. Selling towers, however, will still give cash. This mode can be very challenging because the player cannot make any more money. Fast-Track Mode can be activated, but will have no effe