Accomplish the indicated achievement to get the corresponding number of Gamerscore points:

Building The Network (10 points): Construct 1 of each type of Novus structure during a Ranked or Conquer the World match.
Under Novus Control (20 points): Requires every territory in Conquer the World to be owned by the Novus player.
Can't Stop Novus (8 points): Defeat 5 Ranked Game opponents while playing as Novus.
Whirling Dervish (15 points): Destroy 100 enemy aircraft using only Dervishes during Conquer the World matches.
The Power Must FLOW (5 points): Build 50 Flow Conduits during a single Ranked or Conquer the World match.
Pure OHMage (12 points): Win 5 multiplayer games against other Novus opponents during a ranked game.
Research is Key (35 points): Defeat 5 Ranked Game opponents in a row.
Swift Victory (5 points): Achieve victory within the first 18 minutes of a Ranked Game.
Time Means Nothing (35 points): Defeat 5 Ranked Game opponents in a row.
Dark Matter FTW (10 points): Spend 90% of your time in “Dark” mode during a single Conquer the World match.
Blinded by the Light (10 points): Spend 90% of your time in “Light” mode during a single Conquer the World match.
Unlimited Power (15 points): Defeat 1 Ranked Game opponent while playing as Masari.
Masari Global Influence (20 points): Masari heroes deal 10% more damage during tactical combat.
Gifts are Nice (5 points): Construct 1 of each Masari structure during a Ranked Game or Conquer the World match.
The Sacred Cow (10 points): Collect 200 cows in Ranked or Conquer the World multiplayer games using Kamal Rex.
Peace through Power (8 points): Win 3 Conquer the World games using only the "Assault" research branch.
Mutation Madness (8 points): Win 3 Conquer the World games using only the "Mutagen" research branch.
Technological Terror (8 points): Win 3 Conquer the World games using only the "Quantum" research branch.
Customization Made Easy (5 points): Defeat 3 Ranked Game opponents while playing as Hierarchy.
My Wish is your Command (23 points): Requires every territory in Conquer the World to be owned by the Hierarchy player.
Hierarchy Domination (38 points): Defeat 5 Ranked Game opponents in a row while playing as Hierarchy.
The Basics (10 points): Complete Tutorial missions.
Novus Campaign (15 points): Complete Novus Campaign on normal or hard difficulty.
Hierarchy Campaign (35 points): Complete Hierarchy Campaign on normal or hard difficulty.
Masari Campaign (45 points): Complete Masari Campaign on normal or hard difficulty.
True Power (60 points): All campaigns completed on normal difficulty.
Can't Touch This (70 points): All campaigns completed on hard difficulty.
Zombie Luvin (20 points): Convert 100 civilians into zombies.
Sweep the Leg (10 points): Destroy your first Hierarchy Walker.
Cow Go Moo (20 points): Collect 100 mutilated cows using Reapers.
Nothing to See Here (20 points): Using Altea, Unmake 30 enemy units during a skirmish game session.
Master Tactician (25 points): Win 1 scenario campaign game.
Supreme General (60 points): Play through 1 scenario campaign on normal difficulty without losing any battles.
Infiltrate The Network (25 points): Inflitrate the enemy Flow Conduit network using only the Founder.
Crater Creator (15 points): Destroy five enemy structures using any Super Weapon.
Demolition Expert (15 points): Defeat 1 medium AI in less than 20 minutes.
Hoover Maneuver (40 points): Use Reapers to acquire 40,000 in Raw Materials in a single game session.
Skirmish King (50 points): Defeat 3 hard AI players during a skirmish session.
No Need For Heroes (35 points): Defeat 1 hard AI player without building any heroes.
Feel The Burn (35 points): Defeat two medium AI players during a skirmish session.
Opposites Attract (15 points): Defeat 5 opponents on the opposite platform.
Forged Alliance (10 points): Play a team game with someone on the opposite platform.

Additionally, there is one secret achievement:

My Virtual Life (45 points): Play multiplayer for 75 hours.