Added to PlayBloo
Hard Mode Last Breath Sans — the Undertale fan boss fight, unlicensed.. Discovered on itch.io's new releases feed and added to the PlayBloo catalogue with verified source details.
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0 views 0 plays Released Oct 10, 2026 External GameSource checked
About Hard mode last breath sans
Hard mode last breath sans by wold-19 is a free unofficial fan game built around Sans, the skeleton boss from Undertale, in the community's 'Last Breath' hard-mode AU framing. One screenshot shows the bone-heavy arena.
Fan-made and non-commercial — for Undertale fans who want their dodges judged, hard.
How to Play
Dodge Sans's attack patterns through the fan-made hard-mode fight — bullets, bones and bad jokes incoming.
Controls
Arrow keys – dodge
Z / X – act (typical Undertale-fangame defaults; see the original itch.io page for the developer's control notes)
Tips & Tricks
Last Breath phases escalate — learn each phase's opener before pushing deeper.
Unofficial fan work: support the official Undertale too.
Features
Undertale fan-made boss fight
Last Breath AU framing
Hard-mode difficulty
Free in the browser
Unofficial community project
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