Hearts of Iron IV achievements

As Greece, liberate Albania while being at war with Italy.

As any British Subject state, conquer all of Britain.

Restore the old borders with USA as Mexico.

Successfully stage a coup in any nation using a spy with the Seducer trait.

As Greece, capture Istanbul and rename it to Constantinople.

Have a French and British spy work together on the same Operation.

As the United Kingdom, accomplish the federation of the entire British Empire.

As Yugoslavia, start the Second World War (i.e. be part of either the Axis or the Allies and at war with the other faction in a war you started).

As Sweden, acquire a production license for a Tiger or Tiger II tank from Germany.

As non-aligned Turkey, have zero negative state modifiers.

Occupy Stockholm as communist Denmark.

Starting as a minor power, assume faction leadership of the Allies, the Axis, or the Comintern.