Cheapest it has been on PS4 I believe. Vita version can be had cheaper.
Fate Extella The Umbral Star PS4 Game
The famous FATE series is reborn in an astonishing new game, Fate/EXTELLA: The Umbral Star! Hyper-fast hack and slash action featuring fan-favorite characters, facing off against dense enemy swarms in large-scale battlefields! Enjoy yet another deep storyline that the Fate series is known for, and sharpen your skills in some of the most intense combat the series has ever seen!
Super-fast hack and slash action against thousands of enemies at once!
Includes characters from Fate/EXTRA, Fate/Stay Night, Fate/Apocrypha, Fate/Grand Order and other Fate stories!
A Brand-New Story from Acclaimed Series Author, Nasu Kinoko - the original creator of Fate/stay night and the scenario writer of Fate/EXTRA
A Large Story Told from Different Perspectives - from the independent perspectives of three heroine Servants and enhanced with superb-side stories
The first action game in the Fate series, players will finally be able to control a Servant and incredible super-attacks!
Perform powerful form changes to transform intro different Servants - use their different skills and abilities to gain the advantage!
Engage in intense battles on the ground or in mid-air to annihilate the enemy forces
Players can enjoy the action with the original Japanese voice-overs and English subtitles