Fate/EXTELLA: The Umbral Star

Fate/EXTELLA: The Umbral Star is a 2016 sequel to the 2011 Spin-Off of the Visual Novel Fate/stay night, Fate/EXTRA. It is the third game in the series, and the second to be released in the west. Unlike the previous games, Extella is a hack-and-slash. The gameplay is based around defeating large numbers of generic enemies to take control of sectors and win battles, similar to Dynasty Warriors.

The story features four routes; one based on each of the three heroines, and one true route. The first two focus on Nero Claudius and Tamamo-no-Mae, two of the potential servant choices from Fate/EXTRA and Fate/EXTRA CCC. The third focuses on Altera, a character original to Extella.

Tropes used in Fate/EXTELLA: The Umbral Star include:

Alternate Timeline: Continues off the one from Fate/EXTRA to the original Fate/stay night timeline. Few references are made to the world outside the Moon Cell, however.
Another Side, Another Story: The servants without their own route in the main quest each have a side-story that can be unlocked.
Battle Couple: The protagonist with each of the heroines in their respective routes, and with Nero in the true route.
Chuck Cunningham Syndrome: Based on player choices, the protagonist teamed up with either Rin or Rani in the previous games. Neither appears here, nor is either referenced.
Defeat Means Playable: Every servant in the game must be defeated before becoming playable, often multiple times.
Demoted to Extra: Nameless, who was the third servant in the original Extra, and Gilgamesh, who was an alternative option in CCC. Nameless can be played as in Nero's route while Gilgamesh can be in Altera's, but both are side characters.
- In the true route, Tamano is also relegated to a side role.
Earn Your Happy Ending: Nero's route ends with Hakuno being left in a coma, and Altera's route has her killing both Nero and Tamamo and then dying herself. Luckily, the true ending is relatively happy, with Nero and Tamamo making their peace and the reincarnated Altera being adopted by Nero and Hakuno.
Eleventh-Hour Superpower: Nero's Venus transformation.
Game-Favored Gender: The story is written with the assumption that the protagonist is male. Although this doesn't effect much, there is the dub translating Tamano's term for the protagonist as "husband", regardless of whether they are male or female.
Genre Shift: Fate/EXTRA and CCC were RPGs, while Extella is a hack-and-slash.
Headbutting Heroes: Nero and Tamamo both mean well, but they both see themselves as the rightful ruler of the Moon Cell and lover of Hakuno.
Hello, Insert Name Here: Like in the previous games, the protagonist's name can be chosen. Nero still refers to you as "奏者", which directly translates to "instrumentalist", as she compares herself to a fine instrument. The dub translates this as "Praetor". Tamano calls you "Goshujin-sama"; which can both mean "Master" and a respectful way of saying "Husband."
Holding Hands: In battle, the protagonist remains within the regalia on Nero, Tamano, or Altera's hand. Nero describes the sensation this way.
Panty Shot: Elizabeth Bathory gets quite a few.
Relationship Values: Servant bonds can be increased by completing side-quests, or by correctly answering dialogue choices if it's one of the main three heroines. Bond levels determine the amount of skills that can be equipped to a servant. The max bond level is 30.