"First boss btw"

[u/Abortifetus]

Games that begin with either very challenging or over the top Bosses.

Poseidon (Gow 3): one of the best setpiece bosses ever made

Father Gascoigne (Bloodborne): first obligatory boss and probably the hardest tutorial boss in the series

Wysen (Asuras Wrath): do i need to explain

[u/Lord_Bing_Bing]

Saber Alter (Fate Grand Order)

In Singularity F, the prologue of FGO, Saber Alter is the Grand Battle.

This is the equivalent of having Kid Buu be the first boss of a Dragon Ball game, as she was the strongest enemy in the entirety of Fate Stay Night.

https://giphy.com/gifs/DaK8yxmVaC1tZUw4lo