GREY DAY is a mobile open world zombie survival game built entirely with AI tools by a solo developer. Survive, loot, and fight zombies in a shared world with real players. Real multiplayer — no bots. • Open world with real players • Block-styled graphics • Unlockable character skins • Optional rewarded ads for revival & boosts • Free to play on iOS & Android 📱 iOS: https://apps.apple.com/us/app/gr... 🤖 Android: https://play.google.com/store/ap...