Runemals

The beach area is found at the light blue flag in the bottom right of the map. The final beach quest will unlock once you have completed the mountain history chapter (first quest at the yellow flag).

Below are the 10 Beach Quests (and their required energy amounts) you need to be victorious in order to unlock the achievement.

1. Welcome to Rune Island (1000)
2. Sunny day at the beach (1000)
3. The abandoned lighthouse (1000)
4. Inside a summer storm (1000)
5. Fight for the cliff (1000)
6. A journey to the secret bay (1200)
7. Mysterious shipwrecks (1200)
8. Deep into the whales' cemetery (1200)
9. Smugglers cave (1500)
10. An empty chest (2000)