Here is the full list of all 20 Microsoft Treasure Hunt (Windows) achievements worth 1,000 gamerscore.
Reached level 12 without dying or respawning
Dug 1000 dirt tiles by "chording" (placing flags on nearby traps and tapping the adjacent tiles)
Reached level 3 without picking up any gold or treasure
Used a map 20 times
Reached the exit on level 11 without using any flags
Purchased 3 Amulets in one game
Collected 1000 gold in bonus levels
Dug all dirt tiles without traps on any level
Defeated 3 monsters
Triggered your first trap
Reached the exit on level 1
Purchase the 8 Dynamite Bag
Purchase the 10 Pickaxe Belt
Purchase the 15 Map Tube
Have 5 hearts
Enter a shop with at least 500 gold and spend down to exactly 0 before you leave
Gather 5000000 gold
Use a dynamite 8 times during one level
Defeat 5 bats without defeating any other monsters in-between
Purchase all items and heart upgrades for your character