Complete the indicated task to unlock the achievement.

Achievement	How to unlock
A Good Deed	Return the first Book of History in each Era.
A Secret That Time Forgot	Retrieve one treasure in each Era revealed from returning Books of History.
Citizen Showcase	Get five Citizens in each era to Talent level three.
Citizens Unite!	Recruit all 88 Citizens across both eras.
Citizens of Time	Unlock all achievements.
Collector	Collect hundred items in each era.
Connoisseur	Collect 300 items in each era.
Cross-era Co-operation	Recruit five Citizens in each era.
Era Avenger	Defeat thousand enemies in each era.
Era Emperor	Defeat Boss Tock in Citizens of Space.
Hedging Your Bets	Earn $10,000 in Citizens of Earth and 10,000 credits in Citizens of Space.
Honorary Librarian	Return all books of History in each Era.
I'll Feel This Tomorrow...	Receive 10,000 damage in combat in each era.
Let's Go!	Recruit VP in Citizens of Space.
Local Flavor	Use fifty items in each era.
Old Friends And New	Recruit 25 Citizens in each era.
Political Power	Deal 10,000 damage in combat in each era.
Raising the Deficit	Use hundred items in each era.
Scouring the Timeline	Find hundred treasures in each era.
Stacking the Shelves	Return five Books of History in each Era.
Stimulus Package	Spend $10,000 in Citizens of Earth and 10,000 credits in Citizens of Space.
Talent Tango	Get one Citizen in each era to Talent level three.
Temporal Custodian	Retrieve all of the treasures revealed from returning Books of History in both eras.
Temporal Explorer	Discover twenty locations in each era.
Tidying the Timeline	Retrieve five treasures in each Era revealed from returning Books of History.
Time For An Ambassing	Recruit Ambassador in Citizens of Earth.
Uncharted Time-Territory	Discover fourty locations in each era.
You Cleaned His Clock!	Defeat Boss Tock in Citizens of Earth.
You're So Talented!	Get all Citizens from both eras to max Talent level.