Protocol Defense is a tower-defense game set inside a cyber terminal. Malicious packets crawl along the road toward your system core. Place defense modules beside the path, upgrade them and stop the intrusion. From simple malware to ransomware, DDoS and zero-day bugs, everything is coming for you, and heavy bosses wait at the end of every tier.

Features:
• 200 sectors across 4 difficulty tiers: Easy, Medium, Hard and Very Hard
• A varied set of defense modules: laser, homing missile, radar pulse, slowing field, bait mine, quarantine field and support module
• Multi-rank upgrades with different upgrade paths for every module
• A permanent Firmware tree that strengthens your defense from sector to sector
• 3 special abilities: EMP burst, Overclock and Freeze
• Special enemies: Zero-Day, Ransomware, DDoS and bosses
• Daily reward and a star rating for every sector
• Cyber terminal look with neon music and sound effects
• Fully Persian and English interface
• Plays fully offline


Keywords: tower defense, cyber game, neon game, strategy, defense game, offline game, hacker