XenoWorld ~The Rondeau of Astra~ is a new strategy game that combines chess, card logic, and rogue systems. The game takes place in the mysterious Donud Eisen Forest, where you control the main character and defeat all the enemies to uncover the secrets of the Astra continent. The game features 13 unique boss battles with at least 10 to 40 different skills and eight accompanying passives. The rogue system has various events that can either strengthen, weaken, or grant new chess pieces.

The game's battle system is based on classic Western chess rules, where pieces can be upgraded to obtain higher values, more powerful abilities, and wider movement ranges. The game also features "seals" that can be equipped on the chess pieces, which unlock different styles and have different effects when used in combination. There are four main characters with unique styles, and each character has different attack, survival, mobility, and draw abilities. XenoWorld ~The Rondeau of Astra~ is a full version game available only on Windows.