Tap the game to open it fullscreen. On a computer, Esc exits; on a phone, use the ✕ button.

How to play

The enemy pushes the line. Tap (or press the space bar) to push back; each push costs breath, which returns slowly. If you tap with no breath, you are exhausted for a moment. Save strength for the surges, announced by a warning sign. Hold out for 30 seconds.

The story behind it

The battle of Stiklestad, in 1030, cost King Olaf Haraldsson his life. The sagas say the sun darkened during the fight; whether it was an eclipse, scholars debate. The game is a simplification. Read the story in Stiklestad, 1030: the battle in which King Olaf died and Norway’s saint was born.