千年戦争アイギスA is a free-to-play strategy RPG game developed by EXNOA LLC for iPhone. The game is set in a world where the player takes on the role of a prince whose kingdom was destroyed by an army of monsters. The player must lead a team of unique units to fight off the enemy forces.

The game's key feature is building strong bonds with female and male characters, which increases their abilities and unlocks conversations with them. The game's tower defense gameplay is easy to understand and play, with each level increasing in difficulty. The game also offers a 10-day login bonus campaign, which includes five "highest rarity" black summon tickets. 千年戦争アイギスA is recommended for players with iOS 9.0 or later on iPhone 5s or later, and iPad 5 or later.