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"Flame in the Flood" is a great game.
"Survival elements" are a really tired gameplay mechanic on their own, but combined with a compelling journey through a flooded town, they provide a good experience.
If Humble is offering 100% off on this title, everyone should try it.
I believe the game has been patched to include 'Developer's Commentary', which I haven't seen yet, but that's usually a fun addition.