Swarm Idle Devour Earth, one city at a time

You play an alien queen. Her swarm invades cities district by district, devouring everything in its path while the Wardens, Earth's defenders, try to hold the line. There are 100 cities and 1,000 districts between you and a fully ravaged Earth.

The conquest is more than a counter climbing. Thousands of creatures pour through the streets as a crimson tide, and the city corrupts as the swarm passes through it. On the world map, that corruption spreads outward from every conquered city until it slowly swallows the planet. The tone is dark and the art is stylized, top-down and atmospheric: this is a grim little apocalypse you are running.

Your army is eight creature lineages, and raising them is the core loop. You buy levels, unlock upgrades and talents, and push each lineage toward new power milestones. Their abilities are yours to trigger at the right moment, so a fight is not entirely hands-off.

Then comes Evolution. You sacrifice everything a lineage has accumulated, its levels and upgrades, and it is reborn at level 1 in a far more powerful form. Losing your progress to gain a bigger ceiling is the deal, and each rebirth moves the potential to an entirely new scale. The question the game keeps asking is the same one: where does the next resource go?

When progress slams into a wall, you trigger a Mutation. The swarm starts over from nothing, but your permanent power stays. What took hours on the first pass can fall in moments on the next, and each cycle pushes your frontier further before the next wall appears.

Mutated Wardens drop Genome, and you decide what it is worth. Keep it to strengthen the whole swarm directly, or invest it in nine Princesses that permanently reshape how your progression works. Separately, Bioflux, a rare resource from conquered cities, buys Infusions that raise a lineage's damage. Stack them on your strongest creature or spread them around; after every Mutation they come back, so you can rethink the whole distribution each cycle.