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