Survive as long as possible by destroying an endless onslaught of enemies. Destroying enemies gives you gold which you can use to purchase Auto-Turrets and Upgrades. Turrets level up with experience they get from Kills and Assists. Turrets gain 10 Upgrade Points for each level up they get, which can be spent on: Health Rating - Increases health by 100. (Costs 1 Upgrade Point) Damage Rating - Increases damage by 10%. (Costs 2 Upgrade Point) Reload Rating - Decreases reload time by 25ms. (Costs 5 Upgrade Point) Shot Rating - Increases projectile speeds by 8%. (Costs 1 Upgrade Point)