Elixir of Immortality is a hidden object game that was released in 2010. In the game, the player assumes the role of a detective that has a mission to complete. Someone at the castle is bumping off help, and it is up to the player to find out who the culprit is. The player then goes incognito as the newest hire in order to get to the bottom of the mystery. There are several suspects including the physicist, magician, botanist, and chemist. There is also someone at the castle who only communicates with the player through notes that are left in different locations.
The player must visit different locations and look for items. There are also instances wherein the player must use items in the inventory in order to complete tasks, such as fix objects in the scene. Players must fulfill all their duties as the hired help, while also making sure that they do a thorough investigation. In addition to the hidden object scenes the game offers, there are also mini games in the form of puzzles. The game has offers different game modes for beginners and advanced gamers. Although the castle has several locations, players will get to visit each location more than once.