Here is the full list of all 13 Pulstar achievements.
Do not move for 4minutes.
Pickup a life, multiplier upgrade, weapon upgrade and an explosion while PulseTime is activated.
Get a killstreak of 500 or more.
Play for 3 minutes without getting hit and picking up a weapon upgrade.
Get a higher score than the developer in a singleplayer game.
Get a higher score than the developers in a multiplayer game.
Get a killstreak of 2000 or more.
Get a killstreak of 5000 or more.
Keep 1 monster alive for at least 2 minutes.
Get a score in the world top 10 singeplayer rankings.
Get the best score in the world in the singeplayer rankings.
Get a score in the world top 10 multiplayer rankings.
Get the best score in the world in the multiplayer rankings.