Here is the full list of all 69 Eternal Return (Windows) achievements worth 1,000 gamerscore.
Died within 15 seconds of starting the match
Killed Omega
Killed a player with a trap
Killed the same player twice in one match
Killed a player at Chapel
Killed a player that have killed you in the same match
Killed a player at School
Reached Craft Mastery level 20 in one experiment
Got killed from a trap
Got Resurrected 3 Times in One Match
Finished 20 Daily Quests
Played 100 Matches
Killed a player within 86 seconds of starting the match
Got killed by Wickeline
Died at Docks
Ended the match with 1 second left on your restricted area timer.
Reached Account Level 20
Died at Cemetery
Played 50 Matches
Killed a player at Temple
Died at Hotel
Died at Temple
Died at Hospital
Hyperlooped 50 Times
Killed Alpha
Died at Avenue
Killed a player at Alley
Activated all Security Consoles in Lumia in a single match.
Died at Beach
Ate/Drank 100 Times
Died at Chapel
Reached Account Level 11
Died at Forest
Died at School
Died at Uptown
Killed a player at Hotel
Killed 10 different players in one match
Killed a player at Forest
Killed a player at Beach
Killed a player at Uptown
Killed a player at Factory
Died in the Research Center
Killed a player at Cemetary
Killed a player at Pond
Died at Factory
Got killed from Meteor Impact
Killed a player at Hospital
Got killed by a Wild Animal
Operated 50 Security Consoles
Died at Alley
Won a solo match with 0 kills
Placed 1st
Hunted 30 Wild Animals in a single match.
Hunted each type of wild animal in one match
Died in a Restricted Area
Went to every area in one match
Opened 100 Boxes
Died at Pond
Finished all Tutorial Chapters
Finished 3 Daily Quests
Placed in the Top 5
Died at Archery Range
Killed Dr. Wickeline
Killed a player at Archery Range
Killed 5 different players in one match
Killed a player at Avenue
Entered the Research Center
Killed a player at Docks
Played a Normal Game