Looking for a new  zombie game  to sink your teeth into? I recently discovered Undead Invasion and it's become one of my go-to survival games. It's a pixel-art side-scroller where you fight off constant waves of zombies that get progressively more difficult each day. The retro style is charming, but don't let that fool you—the difficulty ramps up fast.
What sets this apart from other zombie survival games is the combination of action and strategic defense. You're not just running and gunning; you need to place barricades, set traps, and manage your resources wisely. Between waves, you can upgrade weapons, purchase health items, and improve your defenses. The economy system is well-balanced—surviving longer earns more coins for better gear.
The game features various zombie types that get faster and stronger as days progress. You'll need to master different combat styles: ranged attacks to keep distance, melee when they get too close, and grenades for those tight spots. It's completely free to play in your browser, works on both desktop and mobile, and offers hours of replay value. Perfect for zombie game fans who want both action and strategy!