Eat your first food.

Pick up gold.

Open a new zone.

Travel through a portal.

Open a chest.

Use a stored power.

Trap a rival snake.

Trap a Territorial snake.

Trap an Aggressive snake.

Outlast a volcano eruption or lava surge.

Buy an upgrade.

Finish a run.

Reach a length of 10 in one run.

Reach a length of 50 in one run.

Reach a length of 100 in one run.

Survive 5 minutes in one run.

Survive 15 minutes in one run.

Survive 30 minutes in one run.

Buy every level of one upgrade (one-time unlocks don't count).