Horizon Ring

Horizon Ring is an incremental tower-defence game. Before each run, players equip a loadout of Protocols, which are permanent upgrades that are unlocked and improved over time. Loadout capacity is limited, so not every Protocol can be equipped at once. The choice of loadout determines which strategies and tradeoffs apply during a run, such as active clicking, passive income, a preferred tower type, layered fortifications, risky expansion, or a hybrid approach.

The economy can be grown by clicking the HQ for immediate income, by investing in generators for passive income, or by combining both. Defences begin with machine guns and cannons, and lasers, tesla coils, missiles, gunships and specialised modifications can be unlocked later. Fortifications include durable walls, Bastions that can mount Cannons, and Blast Walls that detonate when enemies destroy them. Players can use terrain, tower coverage, target priorities and mobile support to create kill zones while keeping the dome protected. Enemies include airborne, explosive, swarming and heavily armoured threats, and maps alter routes and offer opportunities to expand.

Progression is carried across runs through permanent unlocks earned from wave milestones, achievements and Challenges. Run upgrades and mid-run choice popups also shape each defence after deployment. The game offers endless waves, distinct maps with terrain constraints and special waves, different challenge rules, and four difficulty levels, including Hardcore.