Alien shapeshifters. Their natural state is humanoid, where they employ technology and ranged weapons. In a flash they can transform into their beast form, and tear an Omniframe apart with their bare claws.
Em-8ER pits the players against a AI controlled alien army in a continuous, 24/7 battle for control of an entire world. Players fight to terraform habitable zones on the planet by building terraforming factories, defensive bases and refineries to process ore mined from the planet. The Tsi-hu aliens oppose the humans by invading zones and attempting to destroy what the players have built.
Nearly everything in Em-8ER is built or crafted by players, using the resources and alien artifacts mined from Em-8ER. Players use massive mining mechs called THMPRs ("thumpers") to drill into the planet and extract ore which they refine into usable elements. Players build weapons, abilities, spawn bases, defenses, and contribute to world event goals with these resources.
Em-8ER is a shooter where skill matters. Aim and ability reward skilled players and enhance their powerful gear. Progression of weapons and abilities follows a shallow power curve, and are meant to compliment a player's preference of play-style rather than simply providing massive increases in damage.