Swarm MMO: Browser-based idle MMO where you command a swarm conquer planets
You start with a single planet in your own solar system on an infinite procedurally generated map, and your goal is to expand your territory by conquering other planets.
Every planet produces probes over time, and you attack by dragging from one of your planets to a target to launch a swarm. You capture a planet by sending more probes than it has defenders. You can also upgrade your planets and project power across longer distances. You can form alliances with other players or go at it alone.
The whole thing runs in the browser with no sign-up required. If you want to save your progress across devices, you can optionally link an email.