There's also another main story of Gabriel doing all of this on the notion he'll be able to bring his dead wife back to life once he completes his overall mission

Before the final battle, you find out that Gabriel himself killed his own wife, because Zobek used a spell to force Gabriel to kill her.

Kill bad guys, then at the end, you get your wife back.

He is trying to rescue his wife (who was murdered by the bad guys) from hell, and he has to kill a bunch of bad guys during a long quest to revive his wife.

The story follows Gabriel Belmont as he tries to find a way to avenge/possibly resurrect his dead wife.

Unbeknownst to Gabriel, though, it was he himself, under the mental manipulation of Zobek (who poses as a friend and fellow knight), who murdered his wife

Here's a character that has lost his wife and is supposed to be enraged with a burning desire for revenge