They Are Billions Achievements

Full list of all 26 They Are Billions achievements worth 1,000 gamerscore.

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  • Giant Slayer Level 2

    Kill two Infected Giant on the same map.

  • Giant Slayer Level 3

    Kill three Infected Giant on the same map.

    2 guides
  • The Most Wonderful Colony

    Build the six wonders in your colony.

    1 guide
  • Open Mind

    Win a Survival game (Score Factor >= 100%) without using walls, gates and towers.

    1 guide
  • Soldier Wrath

    Win a Survival game (Score Factor >= 100%) with just Soldiers in your army. No Attack Towers allowed

  • Ranger Revenge

    Win a Survival game (Score Factor >= 100%) with just Rangers in your army. No Attack Towers allowed.

  • Sniper Slaughter

    Win a Survival game (Score Factor >= 100%) with just Snipers in your army. No Attack Towers allowed.

  • No Towers Needed

    Win a Survival game (Score Factor >= 200%) without using Attack Towers like Ballista or Executor.