Frontline Protocol

About

Frontline Protocol is a real-time strategy game that layers deckbuilding and auto battler mechanics onto co-operative base defense. Up to four players share resources and objectives while managing individual card decks to build bases, deploy units, and automate combat against waves of enemies. Each player’s deck choices shape their role, whether boosting economy, handling defenses, or leading aggressive attacks. Success depends on balancing personal strategy with teamwork, as every player’s actions directly support the group’s survival. The game’s depth comes from a constantly evolving progression system. Earn booster credits to buy new cards, upgrade existing ones, and invest skill points into passive bonuses like bigger starting resources or faster income. Missions add variety with randomly generated challenges that offer unique rewards. With over 300 cards affecting units, structures, and tactics, every match tests adaptability. Players on Steam report high replay value from tweaking decks and roles between sessions.