https://www.youtube.com/watch?v=lM0Iew57t4EReminder, there's ps2 berserk game, with Canna (the original '97 Guts's voice actor, who is by far the best) and lot of others as well, like Zodd and Griffith)
The only problem with the game is, it's almost too much of a Guts simulator. He's life really was thought, beats the fuck out of the new musou game though.
The game follows when Guts was the black swordsman, and it has stuff that was never in the manga, like the haunted mansion fight.
Semi canon, i guess? It has schierke too.
You need the fan translation for it, if you want text to be in English, it works great.
There might be some other mods too, but i can't remember.
Skip to the 18:30 to see some Guts zodd action.