8-Bit Turrets are advanced versions of the standard turret which fire 8 shells at a time. They spawn as early as the first floor of the game and have a moderate amount of health.
8-Bit Turrets can quickly make a battlefield hectic, so they should be a priority target. There is enough space to dodge between the shells they fire if you are careful. Like all turrets they can only fire forward so getting behind them is a good strategy to take them out.