Risk: Factions

You will earn this achievement after completing the short five mission campaign included in the game.

In the first mission, "All quiet on the human front", you will be playing as humans, against humans. This mission acts as the tutorial of the campaign, teaching you about new features and rules. This mission features the Missile, which can be controlled by owning three of the four barracks, located in Killoofs, Vanguard, Boot Camp, and Fox Hole. Success in this mission can be earned easily simply by controlling the missile and using it to your advantage.

In the second mission, "A bridge too fur", the Cat faction is introduced and you are in control of their army against the very Human army you were in control of. This map features the mines in Kotka located in Meowping and Tigercat. The dam is also featured here, controlled by owning Birman and Sire.

In the third mission, "The red badge of storage", you will encounter your first three way battle, controlling the Robot army against the Cat and Human factions. The volcano makes its first appearance on this map, surrounded by the energy resource centers in Satcom, Ash Slip, and VC40. Also featured on this map is the Solar Arrays, found in Waren, Cybern, Hardwaren, Felidale, and Tigris.

In the fourth mission, "A farewell to brains", you take control of the Zombie army in a fierce battle against your previous three employers. Von's Temple makes its first appearance on this map, controlled by owning the three surrounding territories (Fire, Water, and Earth Altars). This is the most powerful ability in the game, as each turn you are in control of the Temple, you are able to convert any opponent territory you choose and make it your own and subsequently taking all units in that territory for yourself. The missile and its accompanying barracks are back, and the crypts also appear in this mission, located in Margay, Darkhill, Gutter's Corner, and Boneyard.

In the fifth mission, "Avalanche Now", you are commanding the yeti army against the remaining four factions. Simply be the first to earn three objectives and the achievement is yours. If you are having difficulty winning on this map, try to focus on first securing Von's Temple. It is usually an objective within the map itself, and every time it is under your control at the start of your turn you are able to convert an enemy territory, making those territories with 20+ troops welcome (so long as they are not trying to take over the Temple). This map is also home to the mines on Kotka, and the crypts also make another appearance.

Finish the 5 story missions of the campaign mode.

They are 2 x 2 player maps
1 x 3 player map
1 x 4 player map
1 x 5 player map

It took me about 2 hours to play through this first go but I was going for the stars achievement on the 4 player map and the 5 capitals on the 5 player map (got both).

As it's essentially an extended tutorial just make sure to capture the temple on the later maps and you should be fine.

Here's a neat way of doing the campaign if you're having problems... After each of your turns, or as often as you like, hit start > save and exit > then resume the campaign... you now have a point you can go back to... I save at the beginning of my turn, make sure it's going well, then save when my turn is over... If I lose too many troops on defense, i resume from that save point. This is a game about strength in numbers, make sure you don't lose too much.