No. You can beat both the Sunny Route and Hikikomori Route on version 1.0.0. However, the update fixes a softlock in the "Sweetheart’s Castle" segment.
When OMORI first launched on Switch in 2022, fans noted three major issues: omori switch nsp update eshop top
If you have auto-update disabled or sideloaded an older legitimate NSP backup (for use with a modded console), here is how to compare versions: Pro Tip: If you see a version higher than 1
Pro Tip: If you see a version higher than 1.0.8 (e.g., 1.1.0), that is likely a fake or a modded build. OMOCAT has announced no further major updates beyond 1.0.8. here is how to compare versions: