Attackers

Attackers are the protagonists of JATDG and are your main defence against enemies. All of them are sorted into different uses (Melee, Ranged, Defence, Producers, Supporters and One-use.) They are bought using gold (which is produced 1G per 2 seconds). There are many different attackers which all do different things and have different attributes and abilities. They are unlocked in Story Mode, throughout 8 worlds. These worlds all have differences as well, which require certain attackers to overcome. For example, in World 7 (Chillipepper Volcano), the battlefields are covered with flowing lava, so the player has to use Steel Scraps to allow placing on lava and Fridges to keep attackers from overheating.

Ranged and Melee Attackers
Ranged attackers usually deal damage by shooting projectiles. Projectiles can come in forms like apples from Appletrees, juice from Juice Kid or Tarts from Tartillery. These projectiles deal certain amounts of damage and are shot at different rates, which is measured by DPP and PPS (Damage per Projectile, Projectiles per Second) respectively. Melee attackers deal damage via more close up damage.

Producers
Producers are the least common attacker type with the most notable ones being Miner, Oil Rig, Gold Bomb and Diamond Miner. These produce gold faster so you can place attackers even quicker. However, Diamond Miner produces diamonds instead of gold, which are an in-game currency. You can use diamonds to buy gem attackers, which aren't unlocked via Story Mode but by the Shop.