Planets Under Attack turns galactic conquest into a contest of timing, territory and resource management. Players command a space armada, capture planets to earn income and expand their forces, while weighing each target against the risk of leaving other worlds exposed. Since rivals pursue territory at the same time, the action unfolds across multiple fronts, asking players to scout, deploy units and decide when to attack or defend.
Its campaign spans varied objectives, from holding a planet until reinforcements arrive to exploring uncharted space and preparing defenses before rivals strike. Three difficulty settings let players choose their challenge, and continued play grants experience that unlocks technologies affecting play in both single-player and multiplayer. Cartoon visuals, moving planetary systems and two playable races with distinct ship designs give the strategy a colorful science-fiction identity.
The game also supports local multiplayer for up to four people on one system, with mode and map choices shaping each contest. This range sits alongside a substantial solo campaign, so the game is built around both individual strategic challenges and group play.
