In this video it explains the new maps in the Devastation DLC for COD Ghosts. Here are the maps and the description of the map.
Ruins: A Mayan temple complex in South America, a triangular Domination map with A and C flags on either side and the B flag inside the middle of the temple. An active volcano can be seen smoking in the background. A Field Order Reward will cause the volcano to erupt, firing lava bombs that will explode and take out enemies, much like Mortar Fire.
Behemoth: A giant earth excavator saw, a long-medium map high off the ground where players need to watch their footing. A Field Order Reward allows a player to board a Blackhawk helicopter with a minigun and fire down on enemies, like the Chopper Gunner from Call of Duty: Black Ops.
Collision: A container ship that has crashed into a bridge plays host to this small-to-medium-sized map. A flat map that suits run-and-gun styles of gameplay, the B flag sits above in the middle between two sniping points. A Field Order Reward lets players control an A-10 Warthog on a strafing run.
Unearthed: Set at a meteor excavation site, Unearthed is a reimagination of Dome from Modern Warfare 3. A Field Order Reward allows a player to call in 3 Seeker Cryptids, they will then seek and destroy enemies by exploding, just like they do in Extinction. One Easter Egg twist to this map is players can unlock the Venom-X weapon from Nightfall. It is currently unknown how this is achieved, but gaining that weapon will surely turn the tides of battle.
There is also a new a gun called the ripper. The Ripper is an assault rifle/SMG hybrid weapon. Its barrel length and overall length/size changes as players switch between AR and SMG modes. The SMG mode gives the weapon a high rate of fire and excellent hipfire spread, but with small damage and range. When switched to AR mode, the weapon’s damage and range is increased, a flat Reflex sight is flipped up, but its rate of fire is lowered and hipfire spread widened.
Lastly, the story continues with extinction may day. In may day the player/team is sent to board a Japanese ship where Dr. Samantha Cross is held captive by David Archer. While on board the ship destroying Hives and searching for Cross, players will face two new species of Cryptids. The Seeder attacks with gas clouds fired from its mouth, like the Scorpion. Occasionally it will fire a pod which will mutate into a turret that will fire on players unless taken out. The Kraken is a giant Cryptid with large tentacles that emerges from the sea, so far not much details are known about this species. The Venom-X can now be upgraded into one of 4 variations via crafting items found in the ship. Through the progression of Mayday, there are also side paths which players can take and gain access to items such as weapons, locker keys, things that will help players progress. Assuming, certain items can only be found depending on which path the players take.