Here is the full list of all 21 Gemini: Heroes Reborn achievements.
Completed Temporal Loop
Sisters
Catch 10 Rockets
Dug Deeper
Best Friends Forever
Escaped the Prison
Found What You Were Looking For
Made it to the Elevator
Uncovered Alex
Kill a dozen enemies via Deathtraps
Package Delivered
You Died
Learned Time Scout and Time Shift
Learned Telekinesis
Learned Time Stop
Introduced to Mason
Survived the Elevator Battle
Finished the Opening Tutorial
TK Throw 1000 Things
Find 30 Secrets