Kiloparsec Uprising is a strategy game with turn-based spaceship combat on a hex grid.

A band of rebels operating from a secret base will need to use all of their skills and strategy to overthrow the imperial council and stop the genocide of the Rhani, a peaceful and resource-rich alien race.

Help Darius, Lana, Abeni, and Pablo build the skills and gather the resources necessary to stop the empire and find justice for Lana's husband, who was killed in a government conspiracy to cover up heinous war crimes. Customize their combat squadrons to maximize their effectiveness against a larger and better-equipped enemy.

There is a visual novel prologue to this game called Across Kiloparsecs. You do not need to experience it in order to enjoy this game fully, but it is a good way to learn more of the characters' history.

https://store.steampowered.com/app/2505080/Across_Kiloparsecs/