What about humans invading aliens?

[Rubber Cannonball]

Netrek inspired quite a few later games.  It was one of the pioneers of internet based multiplayer team oriented real time graphical games.  It predates the world wide web.  In turn, netrek was inspired by prior games, such as Empire, on the PLATO computer system/network.  PLATO was way ahead of its time.

[NashGold]

There was 3d animated series about similar concept. And it also had the concept of using the whole planets as space travel vessels. Guess with star's energy you can indeed send a planet flying. But will need a lot of time to accelerate and decelerated without breaking apart. Imagine Solar system getting an alien planet with aliens having plan to use the Sun's energy to continue their travel. Unfortunately the Sun will get extinguished in process...
https://en.wikipedia.org/wiki/Shadow_Raiders

Shadow Raiders is set in a five-planet star system known as the Cluster. The four inhabited planets are in a constant state of war, always raiding one another for resources unique to each planet. However, when an alien named Tekla comes from another solar system, she brings a warning: the Beast Planet is coming. Now Graveheart, a humble miner of Planet Rock, must convince the leaders of Fire, Rock, Bone, and Ice to put aside their differences and stand together against the Beast, their new common enemy.

The story begins as Tekla's homeworld of Planet Tek is consumed by the Beast Planet. She and her robotic companion, Voxx, escape to the Cluster through a Beast jump portal to warn them of the impending danger. Tekla is pursued by Beast drones and crash-lands on Planet Ice, where she is rescued by Graveheart. The drones subsequently attack and slaughter the combined forces of Rock and Ice in the area, leaving only Tekla

A large part of the series mythology in the second season is the World Engines, a propulsion system built into the planets of the Cluster (and presumably many other worlds, since two different planets in different solar systems have them) by an ancient alien race. Using five mountain-sized energy thrusters which emerge from the planet's surface, the World Engines can propel a planet through space at great speeds. A combination of an atmospheric shield and artificial gravity generators keep the sudden shift in orbit and lack of a star from killing everyone on the surface. The Prison Planet has a variation known as Teleport Engines, which teleport the world to different locations in space instantly. The same artificial gravity and atmospheric shielding technology is used to protect the inhabitants. Each set of engines is located at the core of its world and can be reached using Telepods, small platforms on the surface of each world. The Telepods send the user to the core of the planet where they can use the computer to move the planet. The Telepods can also be used to move people from one planet to another.