Here is the full list of all 13 Lifespace Traveler achievements.
Talk to 50 NPCs.
Destroy the creepy statues.
Defeat Syd.
Defeat Gunship.
Defeat Valentine.
Perform 20 Vital Strikes.
Complete the game.
Complete the game without dying.
Have spider bots eliminate 10 enemies.
Eliminate the lightning-shooting coward.
Talk to Isabelle after obtaining the Lifespace Decoder.
Defeat Immolator.
Defeat Xeno.