Online Co-op Strategy with Shared Roles & Tactical Depth

1–4 Player Co-op

Think together - not just click together

Frontline Protocol is built entirely around cooperative PvE - whether you play solo or in a team of up to four. Fight against a dynamic enemy AI that scales with difficulty and time. Each player manages their own resources and decks, while eco-buildings benefit everyone on the team.

You can specialize in economy, defense, or frontline assault - your playstyle affects everyone. Roles aren’t forced, but emerge naturally from your deck choices. Communication, trust, and tactics are the foundation of success.

Shared Resources

Joint infrastructure, individual decisions

You share the battlefield - spawners and building slots are available to all. However, each player spends their own credits. This allows role distribution: one player might build eco, another supports with turrets, a third pushes hard on the frontlines. Use pings and chat to coordinate - no voice chat required.

During battle, everyone plays cards on all spawners, deploys reservists, and uses action cards to shift the tide. The system is made for synergy between different styles - no two players need to play the same way.

Rewards & Difficulty

More players, more loot - co-op pays off

Each match rewards Booster Credits, Player EXP, Card EXP, and occasionally Mission Coins. The higher the difficulty, the greater your reward - tougher battles pay off.

There’s also a multiplayer bonus: the more players in your party, the more rewards each individual receives - even with identical match settings. A full 4-player run will earn more than playing solo.

Classic lobbies let you host or join public and private games. A very easy difficulty makes onboarding smooth - perfect for new players learning the systems. Over time, you’ll unlock more options and enjoy long-term progression - alone or with friends.