Go to Settings > Security > Install from Unknown Sources (varies by device).

Doraemon X is an adventure-puzzle game for Android featuring the classic characters from the Doraemon franchise in a fan-made, objective-based gameplay style. Version is a recent update that typically introduces new character interactions and expanded map locations . Key Features of Doraemon X v0.9c

: This is an Android-exclusive APK. It is not available on official platforms like the Google Play Store.