| Achievement | How to unlock
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|---|
| 3-2-1-GO-1-6-7-8 | Complete "3-2-1-GO-1-6-7-8" relic challenge.
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| A Quiet Place | Complete "A Quiet Place" relic challenge.
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| Caged out | Collect the 1st Memento.
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| Freedom | Collect the 4th Memento.
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| I Come in Peace | Complete "I Come in Peace" relic challenge.
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| I'd Like To Have That In Writing | Complete "I'd Like To Have That In Writing" relic challenge.
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| If It Is Broken, Don't Fix | Complete "If It Is Broken, Don't Fix" relic challenge.
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| It'd Be Too Damned Easy | Complete "It'd Be Too Damned Easy" relic challenge.
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| No Last Eternity | Complete the story of Timelie.
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| Omen | Complete "Omen" relic challenge.
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| Operation Skuld | Complete "Operation Skuld" relic challenge.
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| Retcon | Complete "Retcon" relic challenge.
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| Reunion | Collect the 3rd Memento.
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| Silver Lining | Collect the 2nd Memento.
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| Splinter Cat | Complete "Splinter Cat" relic challenge.
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| The Beginning | Obtained all Timelie achievements.
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| The Most of Us | Complete "The Most of Us" relic challenge.
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| This Is Cat. Can You Hear Me? | Complete "This Is Cat. Can You Hear Me?" relic challenge.
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| Time Waits For No One | Complete "Time Waits For No One" relic challenge.
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| Timelie | Watch the secret ending.
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| Urnique | Complete "Urnique" relic challenge.
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| Well Planned! | Complete "Well Planned!" relic challenge.
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