Here is the full list of all 53 The Lost Legends of Redwall: The Scout achievements worth 1,000 gamerscore.
Travel over X km on foot
Finish Act 1 of the Scout
Continue playing to unlock this secret achievement.
Finish Hilltop Camp
Finish Catacombs
Finish Lighthouse Chase
Create a disgusting soup
Finish the stealth maze without being detected
Finish the scent cave without being detected
Find the picture of Laban and Frabie in Hilltop Camp
Light all the braziers in Catacombs
Open all of the shutters in Catacombs
Hit a rat with a slingshot
Cause a rat to go aggro
Complete Lighthouse Chase without dying
Use all of the alternate paths in Lighthouse Chase in one run
Get Scumsnout to destroy 30 cabbage crates
Get Scumsnout to destroy 40 boats
Get Scumsnout to destroy 200 crates
Get Scumsnout to destroy 200 planks
Get Scumsnout to destroy 25 sandbags
Get Scumsnout to destroy 15 planters
Get Scumsnout to destroy 25 tables
Get Scumsnout to destroy 120 oars
Get Scumsnout to destroy 350 barrels
Get Scumsnout to destroy 60 carts
Watch the canon epilogue
Prevent Swingpaw from burning Thomas's house down
Finish The Pirates without being seen
Visit Jaques Tomb in The Pirates
Visit Sophia's Dad's grave as Sophia in The Pirates
Visit Simon's grave as Liam in The Pirates
Use the wayglass on the patroled bridge to locate the Lighthouse in The Pirates
Reflect on your wedding vows with your spouse
Collect the rat tooth in The Weret
Use the wayglass to see the owl in The Weret
Finish The Pirates
Finish The Weret
Solve the Act 1 Riddle
Learn your first scent
Rescue One Refugee
Rescue All Refugees in The Catacombs
Collect All Lore, Geocaches, recipes, and Mail in The Scouts
Collect All Lore, Geocaches, recipes, and Mail in The Pirates
Collect All Lore, Geocaches, recipes, and Mail in The Catacombs
Collect All Lore, Geocaches, recipes, and Mail in The Weret
Collect All Lore, Geocaches, recipes, and Mail in The Lighthouse
Collect All Lore, Geocaches, recipes, and Mail in Act 1
Use the rooftop path in The Pirates
Use the wayglass to identify the weeping angels in The Catacombs