During the preparation phase before combat, players develop and organize various units, combining their unique abilities to build a fleet strategy. Combat styles vary significantly depending on which units are recruited and what roles they are assigned. Battles are turn-based, and players must command the battlefield by predicting enemy movements, scouting, managing supplies, and positioning units. The core tactical depth of this work lies in the combination of meticulously planned fleet strategies and careful decision-making during combat.

'R-TYPE TACTICS I·II COSMOS' is a reimagining of the original 2007 'R-TYPE TACTICS' and its 2009 successor, 'R-TYPE TACTICS II -Operation Bitter Chocolate-'. With the addition of new missions, the game offers over 100 missions ranging from open space to the interiors of massive fortresses. The story unfolds in the form of a 'Captain's Log' recorded by the protagonist commander, who pushes beyond the solar system into unknown territories while overcoming various missions against powerful enemies.