How to beat Iron Marines Invasion easily?

Struggling with the intense difficulty in Iron Marines Invasion can be frustrating, as enemy waves often overwhelm your defenses before you can establish a foothold. The Invulnerable project eliminates this stress by granting your units complete immunity to damage. With this modifier active, you no longer need to worry about micro-managing health bars or retreating damaged troops. Instead, you can focus entirely on strategic positioning and offensive maneuvers. This allows you to push through tough levels without the fear of sudden defeat. You can experiment with different unit combinations and tactics that were previously too risky. The result is a smoother, more enjoyable gameplay experience where you feel powerful and in control. By removing the penalty for mistakes, Invulnerable lets you learn the game mechanics at your own pace while still feeling the thrill of victory. It transforms a potentially rage-inducing experience into a satisfying conquest, saving you time and boosting your confidence in every battle.