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