Zeus

"...Damage depends on the target's heat. In contrast to the laser, heat and injury do not depend on the distance to the target. Target lock on is required for a shot..." ~ In-game description.
The Zeus heavy energy cannon is named after the chief God of the Greek Pantheon, who was known for his fearsome thunderbolts, which he hurled from high above the clouds from his seat of power — Mt. Olympus. Zeus strikes without warning, sending a searing bolt of energy hurtling across the battlefield to a maximum range of 600 metres. A heavy weapon, Zeus costs 1,500 gold, and is even more powerful when combined with other energy weapons, such as the Gekko laser. As each energy weapon is added to the assault, the temperature of the opponent soars, until terminal heat is achieved. With a five second recharge time, it can be fired many more times per minute of gameplay compared to other heavy weapons. ~UPGRADING~

level :  Lv5   ->  Lv6   ->  Lv7   ->  Lv8   ->  Lv9   ->  Lv10  ->  Lv11  ->  Lv12  ->  Lv13  ->  Lv14  ->  Lv15  ->  Lv16 Silver : 1500G ->  720K  ->  1560K ->  ???K  ->  ???K  ->  ???K  ->  ???K  ->  ???K  ->  ???K  ->  ???K  ->  ???K  ->  ???K - Damage : 7634  ->  8482  ->  9492  ->  ??? -> ???   ->  ???   ->  ???   ->  ???   ->  ???   ->  ???   ->  ???   ->  ???