Star Ocean is a franchise of science fantasy role-playing video games developed by the Japanese company tri-Ace and published by Square Enix (formerly Enix). Star Ocean is known as one of the earliest real-time RPGs to allow players to alter the storyline's outcome through the player's actions and dialogue choices, mainly through a social relationship system referred to as "private actions". The original Star Ocean, published by Enix in 1996, introduced a "private actions" social system, where the protagonist's relationship points with the other characters are affected by the player's choices, which in turn affects the storyline, leading to branching paths and multiple different endings. This was expanded in its 1999 sequel, Star Ocean: The Second Story, which boasted as many as 86 different endings, with each of the possible permutations to these endings numbering in the hundreds, setting a benchmark for the number of outcomes possible for a video game. Using a relationship system inspired by dating sims, each of the characters had friendship points and relationship points with each of the other characters, allowing the player to pair together, or ship, any couples (both romantic heterosexual relationships as well as friendships) of their choice. However, the relationship system in Star Ocean not only affected the storyline, but also the gameplay, affecting the way the characters behave towards each other in battle.