Raiders! Forsaken Earth will be going live on Tuesday, November 10th with a launch discount of 15%. All owners of Age of Gladiators will be eligible for a further discount of 10%, making the total discount to 25%.

https://store.steampowered.com/app/972010/Raiders_Forsaken_Earth/

This will be done by purchasing the bundle containing Age of Gladiators and Raiders! Forsaken Earth when the game is live - however, anyone already owning Age of Gladiators will only have to pay for Raiders.

Will keep you posted!