DLC: Nemesis Cost: $14.99 USD Achievements: 10 Points: 250 Mass Exodus 30 Complete the final Ancestor encounter in Regular or Hardcore difficulty. Unstoppable 30 Complete the final Ancestor with at least 1 relic in Regular or Hardcore difficulty. Nemesis Completionist 30 Complete every challenge and the final Ancestor encounter in Regular/Hardcore difficulty. The Final Chapter 20 Find all 7 story related intel files in Exodus. Postmaster 20 Complete any outpost by activating all of the generators in Regular or Hardcore difficulty. Eggstra Nemesis! 20 Complete the Egg-Stra XP challenge and then activate a generator in the Nemesis DLC package. Timing is Everything 30 Kill the final 3 Ancestors within 10 seconds of killing the first Ancestor in Regular\Hardcore. Always Hard 30 Kill the final Ancestor with a relic active in Hardcore difficulty. Hat Trick 20 Kill 3 aliens with a single shot from the NX-1 Disruptor in Regular or Hardcore difficulty. Secret Achievements You Wish 20 Hit an Ancestor with a Hypno Knife in Regular or Hardcore difficulty. Source - X360A