Create a sense of permanent progression that rewards "free-to-play" players for their time.
: All zombies move 50% faster but have half the health.
: Allow players to attach a "makeshift bayonet" (increases melee range) or "oil filter suppressor" (stealth) mid-wave.
Draft a (like a wave controller) Design a weapon upgrade table with balanced stats
: Introduce a system where players can pick a "flaw" (e.g., lower health) to gain a massive "buff" (e.g., infinite ammo for secondary weapons). 🌍 Community "Outpost" Meta-Game
: Vision is reduced to a small circle around the player, forcing reliance on sound.