It can be a little slow to find your footing in an AFK-style tower defense title, but with these Idle Defense codes, you'll get off to a flying start. Promising enough free upgrade materials to get you out of Noob-rolling territory and firmly into a position to best Golden Farmers before they're knocking at your gates, it doesn't take many codes to upgrade your arsenal. Though it's missing the tower part of the name, Idle Defense is still just that - an idle tower defense title. Take a plot, place your towers, and watch them smack NPCs into the dirt. This one focuses more on the retro R6 Roblox style re-popularized by breakout idle hits like Grow a Garden. That means no anime characters: just noobs, guests in default Roblox t-shirts, and doctors with funny faces.