I'll start by searching for the exact title "Skacat Horny Legends Harem of Goddesses 18 Portable." Using Google and checking platforms like Steam, PSN, or mobile app stores. If it's a new release or a niche game, maybe it's on a different platform or has alternate names. If it's not found, I should inform the user that the game might not exist and offer alternatives or suggest checking the title for accuracy.

Since the user mentioned a "portable" version, the guide might have tips for playing on mobile devices versus home consoles, such as touch controls, save points, and how to navigate the menu efficiently on smaller screens.

I need to make sure the guide is respectful and appropriate, adhering to content policies. Even if the game is adult-oriented, the guide should focus on gameplay aspects like story progression, strategy, and character development rather than explicit content.

Harem management tips could include building relationships with each goddess through dialogue choices, gifts, or side quests. Each goddess might have unique traits or preferences that affect the outcome. Combat strategies, if present, should explain how to optimize team composition, use abilities, and manage resources.

For the gameplay section, I need to describe the core mechanics—how the player interacts with multiple goddess characters, any skill trees, quest systems, or turn-based combat. Since it's a "18+" game, it might have adult content, so the guide should avoid explicit details but still be informative.