Summer Sale is here with a discount to the game and all its DLC!
https://store.steampowered.com/app/770370/Adventures_of_Dragon/
https://store.steampowered.com/app/1067680/Adventures_of_Dragon__Space_Battle_weapons/
https://store.steampowered.com/app/1003250/Making_of_Adventures_of_Dragon/
You can also get them all in a Special Edition
https://store.steampowered.com/bundle/15200/Adventures_of_Dragon__Special_Edition/