ThunderGod

Return to sender

Hit a rock with Mjolnir and send it back where it came from.

Penta lightning

Hit five enemies with a single bolt of lightning

This used to be a nice neighborhood

Get 3 stars on level 1

Odin's offspring to the rescue

Get 3 stars on level 2

Winter is coming

Get 3 stars on level 3

Smells like Muspelheim

Get 3 stars on level 4

God of Thunder

Zapped

Defeat 1000 enemies with lightning strikes

Jotundrepir

Defeat 5000 giants in total