Formation Builder Idle

Formation Builder Idle is an idle RPG built around arranging heroes in a formation. Your heroes fight automatically, but their positions determine how much damage they deal: moving one hero by a single slot can change your damage by orders of magnitude.

Arrange your heroes

The game has 46 heroes whose abilities respond to the grid. Some strengthen neighboring heroes, some affect a whole column, and others depend on traits or the formation as a whole. For example, Lorn buffs every neighbor and grows stronger with each neighbor and each different trait among them; Perrin copies buffs aimed at him and passes them to the column in front; Nerissa gains strength from positional buffs pointing at her; and Falgrim's bonus grows with the square of the number of traits he shares with his neighbors.

Your heroes have gear, and a scarf stat strengthens each hero's ability. With 17 traits, the best layout changes as your roster grows. You can save several formations per world and switch between them. Left-click to level a hero and right-click to buy the maximum number of levels.

Progress through worlds

There are 21 worlds, each with 125 stages to clear. Push through the waves until they stop you, then prestige: your gold becomes talent points to spend across 99+ talents, and each world awards its own World Essence. World Mastery rewards you for returning to earlier worlds with a stronger team.

Lead mounts in combat

Collect and level 12 mounts, assign heroes as riders, and build teams around six terrain elements for a 100-stage mount campaign. The mounts also fight in the Tower of Domination, a weekly 1v1 climb. Leaders do not count there; only mount stats, abilities and elements determine the fight.

Put spare heroes to work

Heroes who are not fighting can contribute in other ways:

• Missions: send spare heroes on timed missions; the crew planner shows your chance of success before you send them.
• Mines and the Workshop: assign heroes as miners and station workers to earn resources and permanent DPS bonuses that remain after prestige.
• Pets: collect 13 pets, which can buff a hero or farm Pet Treats.
• The Seer: spend Diamonds on permanent bonuses to DPS, gold, talent points and mount power.

Earn progress while away

Your formation continues fighting when you close the game. When you return, the server calculates the gold, waves, chests and mine resources earned while you were away.

Shared progress and leaderboards

Your account carries your progress across Windows, Mac, Linux, Android and browser play. Leaderboards let you compare your progress with other players.