10 A history of decimationComplete A New Enemy
10 A little bit extraComplete half of the Campaign bonus objectives
10 A strong showing for the weekComplete a set of 3 Weekly Challenges in one week
10 Alas, poor Yorick!Collect a Skull
10 All or nothingPlay all cards in your deck at least once in a single Blitz match
10 All travel is suspendedComplete Lights Out
10 And the knockout punchComplete Under the Dark
10 Ante-upComplete the Blitz tutorial
10 Behind enemy linesComplete From the Deep
10 DominatedComplete Ascension
10 DuellistWin your first Blitz match (Matchmaking only)
10 Fifth floor: Tools, Guns, Super WeaponsComplete The Foundry
10 FirefighterBeat wave 10 in Blitz Firefight
10 First stepsComplete a Multiplayer match (Matchmaking only)
10 Full houseComplete Blitz matches as each of the 6 launch leaders (Matchmaking only)
10 Guerilla tacticsComplete One Three Zero
10 Know the ropesComplete the Advanced standalone tutorial
10 Last stop, this townComplete Last Stand
10 Learn the ropesComplete the Basic standalone tutorial
10 Making the most of the dayComplete 3 Daily Challenges in one day
10 Natural intelligencePlay a Skirmish match alone against only AI opponents (1 or more)
10 Paint it redAchieve the highest possible kill-streak in any Blitz mode
10 Sentinel size mattersComplete The Halo
10 Spare changeSpend 5 Leader Points in Multiplayer or Skirmish
10 Stacked the chipsGather 150 Energy Crates over any number of Blitz matches
10 Stirring the potComplete The Cartographer
10 The rank and fileRecruit or construct 1 of each UNSC unit in Multiplayer or Skirmish (Launch units only)
10 The setup …Complete Hold the Line
10 The tribeRecruit or construct 1 of each Banished unit in Multiplayer or Skirmish (Launch units only)
10 Two heads are better than noneWin a Skirmish match with a friend against only AI opponents (2 or more)
10 Two heads are better than oneComplete a mission in co-op
10 Wake upComplete The Signal
20 A lot extraComplete all the Campaign bonus objectives
20 Card sharkComplete 25 Blitz matches (Matchmaking only)
20 Comrades in armsEarn a gold medal on any mission (except Prologue) in Co-op on Legendary
20 FlyswatterDestroy 100 air units with anti-air units (Multiplayer, Skirmish or Blitz)
20 Gold rushEarn a gold medal on any mission (except Prologue) on any difficulty
20 Meat grinderKill 100 infantry with anti-infantry units (Multiplayer, Skirmish or Blitz)
20 Morbid curiositiesCollect half of the Skulls
20 On fireScore 500,000 points in a single Blitz Firefight
20 Short-term commitmentComplete at least 1 Daily Challenge each day for a week
20 The hand that feedsKill a unit owned by a developer or someone who has this achievement
20 The Scrappy SixComplete a Multiplayer match as each of the 6 launch leaders (Matchmaking only)
20 Trash compactorDestroy 100 vehicles with anti-vehicle units (Multiplayer, Skirmish or Blitz)
20 You've got a case of the BirleyIn a 1v1 Skirmish against Legendary AI, recycle your base in the first 5 minutes and then win
30 Big SpenderSpend 100 Leader Points in Multiplayer or Skirmish
30 Collecting a dreamCollect all the Skulls
30 It just keeps goingBeat wave 25 in Blitz Firefight
30 Long-term commitmentComplete at least 1 Weekly Challenge each week for a month
30 OverkillDestroy 500 units with Leader Powers (Multiplayer, Skirmish or Blitz)
30 Palmer's Pure GoldEarn a gold medal on every mission (except Prologue) on any difficulty
30 Space HealerCast 100 Healing Leader Powers (Multiplayer, Skirmish or Blitz)
30 This war is overComplete the Campaign
40 JackpotPlay 777 total Blitz cards over any number of matches
40 Lone WolfComplete any mission (except The Signal) solo on Legendary with all skulls activated
40 The hard fightComplete the Campaign on Heroic
60 Surviving the long war 60Complete the Campaign on Legendary