Lust Goddess is a free-to-play mobile/browser card based strategy game with some adult-themes. You can grab it from Nutaku.net. It’s a fun time-sink that you can play without having to spend any money. That said, progress can feel quite slow but is rewarding. Take a look at the video for the full lowdown on how to play and the mentality behind the game’s systems. Also as mentioned in the video, I have reached League 15 as shown in the screenshot.