Here is the full list of all 49 Streamline achievements.
Sprint for 30 seconds without stopping.
Unlock twenty cosmetic items.
Unlock one cosmetic item.
Unlock five cosmetic items.
Play at least 10 games of Streamline!
Taunt while the Hunter can see you.
Be the last Runner standing.
Be one of the last 25% Runners standing.
Reach level 2.
Stun another Runner and then get stunned within 5 seconds.
Get stunned and then stun another Runner within 5 seconds.
Eliminate the Runner with the least points with at least 5 other Runners still standing.
Be within 5 meters of another Runner when they are eliminated.
Eliminate a Runner in the air.
Eliminate yourself. :(
Don't touch the ground for 5 seconds.
Eliminate a Runner that has not seen you in the last 10 seconds.
Stun the Hunter.
Eliminate another Runner during Sudden Death.
Get stunned.
See the Hunter eliminate another Runner.
Eliminate the Runner with the most points with at least 5 other Runners still standing.
Be within 3 meters of the Hunter and then get 25 meters away.
Don't move for 30 seconds.
Be the last Runner standing and eliminate the Hunter.
Eliminate a Runner in a section that is closing off or has closed off.
Eliminate a Runner that is stunned.
Eliminate a taunting Runner.
Eliminate a Runner that picked up points dropped by another Runner in the last 5 seconds.
Eliminate a Runner while wall running.
Eliminate a Runner from behind.
Eliminate 5 Runners in under 20 seconds.
Eliminate 10 Runners in under 30 seconds.
Stun 10 Runners in under 30 seconds.
Stun 10 Ghosts in under 30 seconds.
Wall run for 10 seconds.
Loot 3 orbs from eliminated Runners in under 10 seconds.
Recover from less than 5% health.
Eliminate all Runners with more than 90 seconds left.
Stun 10 Runners in 30 seconds.
Reach level 5.
Reach level 10.
Reach level 25.
Reach level 50.
Unlock fifty cosmetic items.
Play at least 100 games of Streamline!
Have someone bet over 100 credits on you.
Have someone bet over 1000 credits on you.
Have someone bet over 10,000 credits on you.