Here is the full list of all 55 RISK: Global Domination achievements.
Defeat 100 computer players
Defeat 10,000 enemy troops
Play 5 games with different avatars
Defeat 5,000 enemy troops
Achieve 200 victories
Claim 50 cards from defeated players
Win 25 single player games
Defeat 50 computer or human players
Win 50 "Play Online" multiplayer games
Win 25 "Play Online" multiplayer games
Lose 10 games
Defeat 25 computer or human players
Win 100 single player games
Roll 4 sixes in a row
Play 100 RISK games
Win 100 "Play Online" multiplayer games
Turn in 100 sets of Territory cards
Defeat 100 human players
Win 50 single player games
Turn in 50 sets of Territory cards
Lose 50 games
Roll 4 ones in a row
Be eliminated before your first turn
Agree to 10 "let's attack" requests
Play an online multiplayer game
Start a game using Automatch
Win 1 "Play Online" multiplayer game
Hold 9 Territory cards at once
Form 50 alliances
Form 25 alliances
Draft 10,000 troops
Express yourself through 10 Emojis
Defend 15 attacks in a row
Defend 10 attacks in a row
Defend 5 attacks in a row
Lose 3 games in a row
Lose 3 games
Draft 1,000 troops
Make one new global multiplayer friend
Break 5 alliances
Form 1st alliance
Play the same map 10 times
Tap on most of the help tooltips
Click on privacy links
Defeat 5 expert computer players in a single game of the French Revolution map
Compete in a game that lasts 15 turns or more
Turn in 10 sets of Territory cards
Defeat 1,000 enemy troops
Conquer 15 territories in a single turn
Win 1 single player game
Defeat 5 expert AIs in a single game of Classic World Domination Map
Conquer 10 territories in a single turn
Draft 250 troops
Conquer 5 territories in a single turn
Make an in-app purchase