Floodland

The climate change was a catalyst for a sucession of events that led to the destruction of our world; rising sea levels have innundated the coasts. Only you can help humanity survive by leading your band of survivors on a path to redemption. Starting with a lost bunch of survivors, you need to scavange resources, rediscover technology and maintain the peace between differing factions as you strive to rebuild society. (mobygames.com)