Summer Sale is here with a discount to the game and all its DLC!
https://store.steampowered.com/app/851840/Strangers_of_the_Power_2
https://store.steampowered.com/app/1080840/Strangers_of_the_Power_2__Pain_Queen_character/
https://store.steampowered.com/app/1182120/Strangers_of_the_Power_2__Forgotten_Evil/
You can also get them all in a Deluxe Edition
https://store.steampowered.com/bundle/14269/Strangers_of_the_Power_2_Deluxe_Edition/