Civilization: Beyond Earth – Rising Tide is the first expansion pack for Firaxis’ 4X strategy game. Rising Tide allows players to colonise and mine the vast seas of alien worlds, building floating settlements and finding unique resources.Primordial world and aquatic life are two new biomes, with untamed wildlife and volcanic activity. The sea brings with it all-new alien beasts, combated through a dramatically altered diplomatic system and the combining of alien artifacts.