The Xenogears, Xenosaga and Xenoblade games are part of the legacy of games that begin with "Xeno". For the time being, rpg-o-mania focuses on the Xenoblade series that started with the Wii version and had some iterations on the 3DS, WiiU and Nintendo Switch since then. You can find other Xeno images from time to time here, of course!
The games are all created by Monolith Soft, a company that was founded in the early 2000s by former Square Enix employees.