Prepare your defenses To play Endless Siege, place turrets in the available spots. At the start of the game, you should place these turrets near the entrance where the enemies will be arriving. When you’ve prepared your defenses, hit the ‘next wave’ button to start the first wave. Upgrade your weapons You can level up, upgrade, and sell your defenses before and during enemy waves. The starting defense weapons are: Ballista Torch Cannon Timewarp Much later in the game, you can upgrade these weapons to entirely new, more technologically advanced defense towers. These upgraded weapons are significantly more powerful but also cost a lot of gold. In the earlier rounds, save some gold in anticipation of these upgrades.