Here is the full list of all 16 Immortus Temporus achievements.
Finish "Portal" without dying.
Finish "Persistence" in less than 4.00 seconds.
Finish "Beating Heart" without dying.
Finish any level when the timer shows "0.0".
Find an "Invisible" passage.
Finish any level 1 second faster than the "Gold Time".
Die within 0.10 seconds of starting a level.
Finish "Pathfinding" with less than 4 deaths.
"Pick the Lock" in less than 2.40 seconds.
Destroy all parts of a "Traffic Light".
Attempt to escape the "Subway" without a ticket.
Punch all the holes on "Punched Card".
Get "inside" of a "Porcupine".
Complete "Slash" without touching any of the green items.
Push the restart button 100 times.
Try to swim in the "Waterfall".