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