If a 100% file from someone else doesn't instantly give you the achievements, using an achievement manager or unlocking a single simple secret (like "Super Bum") might trigger the cascade. However, be aware that while this method works, using external tools like the Steam Achievement Manager (SAM) is generally against the spirit of achievement hunting and is often flagged by achievement tracking websites.
Searching for is a common rite of passage for veteran players returning for the final DLC. It’s a shortcut, yes, but one that can reinvigorate your love for the game by removing the tedium of re-unlocking the same items for the fifth time. the binding of isaac repentance 100 save file download full