Radiata Stories is an action role-playing video game. It was developed by tri-Ace and published by Square Enix for the PlayStation 2. Noriyuki Iwadare composed the soundtrack.

Radiata Stories takes place in the land of Radiata. The land has many regions linked by great bridges. In the center region is Radiata City, where the story starts and may continue, given the human path is chosen.

In Radiata, humans and fairy creatures live together in peace until the story progresses. Just about halfway through the game, the player must choose a side by either choosing the Human path or the Non-Human path.

It sold over 413,000 copies worldwide. It was released on January 27, 2005, in Japan and September 6, 2005, in North America. The game received mixed reception in both Japan and in North America upon release, however over time it has developed a loyal fanbase. Radiata Stories places great emphasis on its persistent world and non-player characters (NPCs) each with their own lives, lifestyles, jobs, personalities, homes, dialogues and schedules, which are controlled by the game's Day/Night system.

The game provides the novel ability to kick almost anything. Kicking furniture and other inanimate objects will occasionally turn up items or dagols (the local currency). Kicking NPCs several times will cause them to fight Jack, or summon guards to fight for or with them. Jack gains experience, money, and possibly items when he wins these duels, but will not lose the game if he is defeated. Jack may only win a duel against each character once each day.

176 NPCs are recruitable. Some need only to be talked to, while others must be placated with fetch quests, dueled, recruited after Jack or a certain character has reached a certain level, or during certain moments in the game's story. After recruitment, they are placed on his "Friends List," at which point the player may include most of them in Jack's party at almost any time. The Friends List also provides capsule biographies for each character. It is impossible to complete everything during a single playthrough.

NPC party members can strengthen their single skill. However, they do not learn new ones, and cannot be given new weapons, armors and accessories, so skills and equipment are significant criteria in choosing one's teammates. There is also no "magic" stat, forcing the player to constantly recruit new party members as magic spells do not increase in power.

Depending on the path the player chooses, they will lose certain characters that they recruited, and characters they didn't recruit will be unrecruitable for the rest of the game. Also, certain areas of the game will be inaccessible.

After completing the game, the player may continue playing the same game, unlocking a bonus dungeon, the Dragon Lair Cave. If the player chooses the option "Strong from Start", they will retain all their skills, money, and some items. All the characters the player recruited will be kept in their Friends List. However, the player must recruit the characters again in subsequent playthroughs.