You start with only the base Ant. Every other line has to be permanently unlocked with Ant Coins before it can be equipped. Once a line is unlocked, spend Ant Coins on it here too for stronger starting tiers — each tier costs half its in-run XP price. Unlocks apply the moment you start a run.
// Ants cost cents and march left · Bugs are free and march right · +25¢ every 2s · kill bugs for bounty · clear waves for XP · defend your base!