A game about expanding your empire across the stars. Pick (or make) and alien race, start off on one planet with just a few basic ships and start from there. Explore your galaxy, colonise planets and encounter other aliens.
You can focus on taking things by force, or try playing nice – or switching between the two depending on what civilisations you encounter. Sometimes war may be the only option – especially if you encounter an aggressive people and something about your species greatly offends them, so they won’t rest until you are purged from the galaxy.
There is a lot in the game that you can manage, but Stellaris manages to not feel overwhelming either. The mod support for the game is great, too – there’s a Star Trek mod that is brilliant, and adds in missions and small events that can happen, turning it into an amazing Star Trek game.