Here is the full list of all 23 Void Vikings achievements worth 1,000 gamerscore.
Unlock the Skadi ship.
Unlock the Surt ship.
Unlock the Tyr ship.
Get a 25x kill streak in Valhalla.
Get a 10x kill streak in Valhalla.
Pay off a Masters degree education.
Pay off any education with only one payment.
Pay off any education using only the original equipment.
Pay off any education with all four electives equipped.
Earn $100,000 in interest.
Melt down 5000 items.
Upgrade 5000 items.
Pay $1,000,000 on education loans.
Get 1000 multi-kills in Valhalla.
Attempt 25 high scores.
Destroy 10,000 green enemies.
Destroy 10,000 yellow enemies.
Destroy 10,000 blue enemies.
Destroy 10,000 purple enemies.
Destroy 1000 destroyer enemies.
Destroy 1000 battleship enemies.
Destroy 1000 boss enemies.
Destroy 1000 special enemies.