Lost Eidolons

Lost Eidolons is a tactical role-playing game, where the player controls a group of mercenaries in a quest to overthrow a kingdom's evil emperor. The game is divided into 27 chapters, each containing combat segments, where the player controls the army through turn-based, grid-based tactical combat, and camp segments, where the player controls the protagonist in real time in their camp.

Each player and enemy character has a class, as well as equipment. Weapons include melee weapons such as axes, swords, and spears, bows, and magic. Combat revolves around a weakness system, based on characters' equipped weapons and armor. There are also enemy monsters, which use their own weakness system.

Eden is a freelance mercenary in the small town of Lonetta, under the rule of the Artemesia Empire, founded by Emperor Ludivictus. Despite Ludivictus's attempts to unify the land into a prosperous empire, Benerio suffers from oppression and corruption after learning of a fateful prophecy by a high priest who claims his empire would fall and enter a reign of madness, on his venerable birthday, the Emperor was said to have disappeared. Eden and his friends, Leon and Francisco, are hired by Sera to rescue her sister, Andrea, from a jail controlled by the corrupt Lord Rodrigo, only to be arrested by the Lonettan Guard on Rodrigo's orders. With the help of Marchelle, an Imperial inquisitor investigating the corruption, Eden and his company escape, but Rodrigo is killed by Sera, and Eden's company is branded as fugitives.

With the empire in disarray due to ongoing revolts and corruption from the Emperor's disappearance, Eden flees to the kingdom of Benerio and enlists his services under Isoro Feniche, who is rallying people to rebel against the empire. Working alongside Balastar Feniche, Isoro's nephew, Eden liberates Mora and recruits Gilbert, an Imperial tactician, into the army. Klara, a fellow mercenary, helps Eden capture Selven using subterfuge. Upon arriving at Collis, the Feniche forces learn that one of the Orsios, the heirs of Benerio, is in the city.

Lost Eidolons was developed by Ocean Drive Studio , a South Korean game development studio founded in 2009. The development team consisted of nearly 60 people. They were mostly from Nexon, including creative director Jin Sang Kim and head of operations Jungsoo Lee. Lost Eidolons was their first project, which they undertook as they were interested in creating a story-based game without the monetization limitations of an MMORPG or free-to-play game. Kim described the game as having gameplay influences from the Japanese Fire Emblem series, with the aesthetics of Western titles such as Baldur's Gate or The Witcher.

Lost Eidolons held a campaign on crowdfunding platform Kickstarter in April 2021, which was held not for the purpose of funding game development, but for the purpose of increasing the game's scope and bringing it to other platforms. The game was released for Windows on 13 October 2022. It was later published for the PlayStation 5 and Xbox Series X and Series S on 24 August 2023.

Lost Eidolons received "generally favorable" reviews according to review aggregator Metacritic. 73% of critics recommended the game according to OpenCritic. In Japan, four critics from Famitsu gave the game a total score of 32 out of 40, with each critic awarding the game an 8 out of 10.

RPG Site described the game as a good first foray into the genre by Ocean Drive Studio. They praised the game's mechanics, complimenting the depth created by the gear and tactical mechanics. However, they criticized the story, art, and animations. They found that the game borrowed elements of traditional western role-playing games more than typical for the genre, with characters not being locked to classes and a rarity-based equipment system.

A spin-off, Lost Eidolons: Veil of the Witch, which features roguelike elements, was announced on September 1, 2023. There was a preview event at PAX West 2023. It was released on November 6, 2024, in early access and was fully released on October 9, 2025.