To unlock the Antique Saber, go to the bars with the alternating currents when you have Thimbletack's Jack. Go to the third bar, run to the left, and follow the platform behind you until you find a hook you can use to aim your jack. Swing to the other side to unscrew the Antique Saber.
ACHIEVEMENT - HOW TO UNLOCK Chapter One Beat (10 points) - Find the Field Guide. Chapter Two Beat (10 points) - Get the Monocle. Chapter Three Beat (10 points) - Burn the Field Guide. Chapter Four Beat (10 points) - Find Aunt Lucinda. Chapter Five Beat (10 points) - Tame the Griffin. Chapter Six Beat (10 points) - Return to the Mansion. Chapter Seven Beat (10 points) - Defeat Mulgarath! Chapter Eight Beat (80 points) - Beat the Field Guide. Roach Killer (10 points) - Collect 10 Cockroaches. Roach Conqueror (10 points) - Collect 25 Cockroaches. Roach Master (30 points) - Collect 50 Cockroaches. Gobstone Enthusiast (10 points) - Collect 25 Gobstones. Gobstone Collector (10 points) - Collect 50 Gobstones. Gobstone Fanatic (30 points) - Collect 100 Gobstones. Ball Bearings Enthusiast (10 points) - Collect 25 Ball Bearings. Ball Bearings Collector (10 points) - Collect 50 Ball Bearings. Ball Bearings Fanatic (30 points) - Collect 100 Ball Bearings. Faerie Fruit Enthusiast (10 points) - Collect 10 Faerie Fruit. Faerie Fruit Collector (20 points) - Collect 20 Faerie Fruit. Faerie Fruit Fanatic (50 points) - Collect 40 Faerie Fruit. Goblin Killer (10 points) - Collect 100 Goblin Teeth. Goblin Conqueror (20 points) - Collect 250 Goblin Teeth. Goblin Master (50 points) - Collect 500 Goblin Teeth. Fire Salamander Collector (30 points) - Collect 10 Fire Salamanders. Leatherwing Collector (10 points) - Record all Leatherwing Sprites. Royal Orchid Collector (10 points) - Record all Royal Orchid Sprites. Flower-Winged Sprite Collector (10 points) - Collect all Flower-Winged Sprites. Flower-Head Collector (10 points) - Record all Flower-Head Sprites. Will O' The Wisp Collector (10 points) - Record all Will O' The Wisps. Bellflower Collector (10 points) - Record all Bellflower Sprites. Stray Sod Collector (10 points) - Record all Stray Sod. Sprout Collector (10 points) - Record all Sprout Sprites. Beetle Mimic Collector (10 points) - Record all Beetle Mimic Sprites. Pond Skater Collector (10 points) - Record all Pond Skater Sprites. Fire Salamander Master (10 points) - Beat the Fire Salamander page in the Field Guide. Cockatrice Research (20 points) - Beat the Cockatrice page of the Field Guide. Griffin Tamer (10 points) - Beat the Griffin page in the Field Guide. Redcap Recording (10 points) - Beat the Redcap page in the Field Guide. River Troll Master (10 points) - Beat River Troll page in the Field Guide. Knocker Unlocker (10 points) - Talk to both Knockers. Green Thumb (40 points) - Beat Garden Sprites quest. Goblin Trapper (20 points) - Trap a Goblin inside a Toadstool Ring. Goblin Distracter (20 points) - Send a Goblin over a cliff with a Distract Sprite. Goblin Roaster (20 points) - Send a Goblin into a Fire Salamander with a Distract Sprite. Tour of Arenas (20 points) - Beat a multiplayer match in every ISL Arena. ISL Master (50 points) - Finish an ISL match in which each player scores 50+ points. ISL Champion (100 points) - Score 100 points in a "Sprites and Goblins" ISL Arena match without taking damage. Interior Decorator (50 points) - Fully decorate Thimbletack's house. Slime Boy (10 points) - Get Hobgoblin spit for Simon. Phlegm Face (10 points) - Get Hobgoblin spit for Mallory.
Simon is the only character that can find Knockers. To get the first one in the cave at the Qaurry, extinguish the lava using you Splattergun. There is another one at the end of the Cellar Tunnels. Throw a Boomstone at the crystal to get the Knocke
On your way to the Quarry to rescue Simon, you will encounter a River Troll who will not let you cross. Make sure you record the Will o' the Wisp. In order to cross the river, feed it ten Goblins and it will fall asleep. Alternatively, you can turn it into stone by using Simons Splattergun to push it into the sunlight.
The Cypress Tree folk are located in the middle of the pond in the Deep Woods. It will teleport you to the Griffin's perch. The Oak Tree Folk are also located in the Deep Woods. They are blocked by brown bushes that are guarded by a Stray Sod. It will lead you to the end of the Cellar Tunnels.
To get the Pond Skater Sprites, after entering the Forest Road from the Mansion, continue straight until you reach a pond that is blocked by a log. You can catch the Pond Skater there. The other Pond Skaters are located at the ponds in the Deep Forest and at the bottom of the Quarry.
When Mulgarath chases you, run toward the kitchen and use the dumbwaiter. Hit any chairs that are in you way with your bat. Once you start going up, Mulgarath will transform into a snake and chase you. When you reach the study, three Goblins will try to attack you. Ignore them and continue on. The other side of the study will be blocked by furniture. Climb over the large bookcase and continue running. The snake will catch you, but Thimbletack attacks it so that you can get out the window. Jump to the other ledge and climb up the roof. When you reach the top, run to the ladder and start climbing. A clip from the movie will appear and Mulgarath ends up getting eaten by Hogsqueal.
After recording Waffleflea, he will challenge you to a race. After releasing him, he will appear in front of the house. Talk to him and he will ask you to run through the waypoints until you reach the main gate. To easily win, immediately catch him after you have finished talking, or use a Dash ability and then run through the waypoints.
After catching a faerie, you must paint it in order to record it in the Field Guide. There will be a time limit so do not spend too much time painting small details or else the paint will start to spread over it. After recording a faerie, you will not have to paint it again the next time you catch it.