The original campaign has a finite ending. v2.4.0.6 vastly improves Endless Mode, adding a new "Destination" system. Instead of just surviving forever, you must find specific landmarks to unlock permanent upgrades.
Version numbers matter in survival games, which receive constant balance patches. v2.4.0.6 represents the final, most refined iteration of the game before the developers moved on to new projects (like Drake Hollow). The Flame in The Flood v2.4.0.6-GOG
If you are playing The Flame in The Flood v2.4.0.6-GOG, you are playing the Ultimate Edition in every sense. This version includes: The original campaign has a finite ending
Earlier versions suffered from:
v2.4.0.6 smooths these issues entirely. The calorie economy is now punishing but fair. Hypothermia doesn't kill you in 30 seconds unless you are genuinely careless. The Flame in The Flood v2.4.0.6-GOG