Normally movies are based on games and/or books, but would it feel the same if a game was based on a movie that has no book?

Final Fantasy VII Advent Children is an example, it does not have a game as such, it is a Japanese 3D animation that lasts 1 hour 40 minutes. The film was awarded the Maria Honorary Prize at the International Film Festival of Catalonia on October 15, 2005.

Set chronologically two years after the Final Fantasy VII game, Advent Children's plot centers on Cloud Strife, who, tormented by his inner demons and past failures, ends up taking distance from his friends. It is then when three mysterious silver-haired men appear, The Remains of Sephiroth, who begin a surprise attack in the city of Edge and harass the president of the Shinra company, Rufus Shinra, about where this Mother, whom they desperately seek, all this complicates the situation of isolation of Cloud, who understands that he must try to forgive himself for what happened with his friends in the past. 

After a brief investigation, Cloud discovers that the three men are searching for Jenova's remains as part of a plan to revive Sephiroth.

I have always imagined what the games in the series would look like in the style of the classic RPGs from the 90s with 16-bit graphics. (It can be seen in FFRK)

This would be a design/montage of how it would be the introduction of Cloud in Advent Children in 16 bits.

2016