ACHIEVEMENT - HOW TO UNLOCK Betilla's Back! (15 points) - Head Nymph Betilla is Free! Beautiful Beats! (15 points) - Holly Luya, the Music Nymph is Free! Feed the Fairy! (15 points) - Edith Up, the Gourmet Fairy is Free! Merm-Aid! (15 points) - Annetta Fish, the Ocean Nymph is Free! Nymphs Rock! (15 points) - Helena Handbasket, the Mountain Nymph is Free! Scout (15 points) - You found 10 hidden cages. Explorer (35 points) - You found 25 hidden cages. Dr. Lividstone, I presume? (80 points) - You found ALL hidden cages. Speedy! (15 points) - Earned 5 speed trophies! Turbo! (35 points) - Earned 15 speed trophies! Nitro! (80 points) - Earned ALL speed trophies! Electoon Friend (15 points) - Completed 10 Medallions. Electoon Hero (35 points) - Completed 25 Medallions. Electoon Legend (80 points) - Completed ALL Medallions. Milk Tooth (15 points) - Earned 1 Skull Tooth. Full Mouth (35 points) - Earned 5 Skull Teeth. The Jaw! (80 points) - Earned ALL Skull Teeth. Pop! Pop! BOOM! (15 points) - Popped 50 Enemy Bubbles. The Bubblizer! (15 points) - Chain-Bubblized 4 Enemies. I'm Back! (15 points) - Replayed any completed map. Painless! (15 points) - Completed a level without taking a hit! Vacuum Snack! (15 points) - Inhaled 50 things on Moskito-back. No Panic! (15 points) - Saved ALL Darktooned Wizards in "Port 'O Panic". B Side! (15 points) - Played an Unlocked Character in any map. Hover Happy! (20 points) - One hour of flight time! Crusher! (15 points) - Crushed 50 Enemies. Crush Combo! (15 points) - Simultaneously crushed 4 enemies. Sprinter! (20 points) - Sprinted a Marathon! Fisher King! (20 points) - Swam a Marathon! Kung Fu Combo! (15 points) - Perform a swipe-to-air Kick Combo! Hyperspeed! (35 points) - Sprinted for an Entire Level! Boing! Boing! Boing! (15 points) - Bounce-Bubblized 11 Enemies without landing in "Polar Pursuit!" Blue Baron! (35 points) - Beat the Giant Eel within 60 Seconds in "Aim for the Eel." Survivor! (15 points) - Survived a Piranha Pond without a scratch! Back At You! (15 points) - You Bubblized a Hunter with his own live missile!
Additionally there is one secret achievement. Secret achievement (80 points) - Unknown.
How do you unlock the Sprinter achievement?
Answer from thesacredhaven
You must sprint a marathon (about 26 miles or 42.196 kilometers). Just keep sprinting until you get the achievement (press RB to sprint). I don't know how the game measures distance though so just run run run!