Full list of all 12 Risk: Factions achievements worth 200 gamerscore. It takes around 8-10 hours to unlock all of the achievements on Xbox 360.
You have defeated someone over Xbox LIVE with the Man Up! achievement.
You have won 10 ranked games on Xbox LIVE.
You played 5 games on Xbox LIVE.
You have won a game on each map in custom game.
You have achieved 10 super overkills.
You have won a 5 player ranked Command Room game on Xbox LIVE.
You killed 100 military, cat, robot, yeti and zombie units.
You owned everyone by controlling 5 capitals.
You completed the human, cat, robot, yeti and zombie campaigns.
You traded 10 stars for 30 troops!
You have successfully defended 5 attackers with 1 troop.
You got an objective before everyone else.