PBZ Codex is an unofficial, independent field guide to Phantom Blade Zero. It includes a bosses list, a missables checker, a true ending checker, a map, weapons and lore pages, a 100% tracker, region checklists, and Steam sync and Steam stats. It covers PS5 and PC (Steam and Epic).
It is a web product with no pricing stated, and the checklist and tracker need no account. The footer reads 'Unofficial fan site, not affiliated with or endorsed by S-GAME', with trademark and copyright credit to S-GAME. The site carries ads.
Phantom Blade Zero players wanted one place to look up lore, characters and weapons and to track their progress. PBZ Codex was built as that reference.