Here is the full list of all 20 Crime O'Clock achievements. It takes around 15-20 hours to unlock all of the achievements on Windows.
Solve 30 criminal cases
Assimilate CHIMERA
Complete Lost Age Nexus Event
Unveil 40 Fulcrum stories
Solve 20 criminal cases
Unveil 20 Fulcrum stories
Complete Information Age Nexus Event
Assimilate RAGE
Solve 10 criminal cases
Solve 5 criminal cases
Unveil 1 Fulcrum story
Solve 1 criminal case
Solve 40 criminal cases
Assimilate OBLIVION
Assimilate AVATAR
Assimilate LEGACY
Complete Atlantean Age Nexus Event
Complete Steam Age Nexus Event
Complete Aeon Age Nexus Event
Complete the game