Here is the full list of all 41 Crystal Rift (Windows) achievements worth 1,000 gamerscore.
Make it to the end of the first dungeon
Make it to the end of the second dungeon
Make it to the end of the third dungeon
Make it to the end of the fourth dungeon
Make it to the end of the fifth dungeon
Make it to the end of the sixth dungeon
Make it to the end of the seventh dungeon
Make it to the end of the eigth dungeon
Make it to the end of the ninth dungeon
Make it to the end of the tenth dungeon
Make it to the end of the eleventh dungeon
Make it to the end of the twelfth dungeon
Make it to the end of the thirteenth dungeon
Make it to the end of the fourteenth dungeon
Make it to the end of the fifteenth dungeon
Make it to the end of the sixteenth dungeon
Make it to the end of the seventeenth dungeon
Make it to the end of the eighteenth dungeon
Make it to the end of the nineteenth dungeon
Make it to the end of the twentieth dungeon
Make it to the end of the twenty-first dungeon
Make it to the end of the twenty-second dungeon
Make it to the end of the twenty-third dungeon
Make it to the end of the twenty-fourth dungeon
Finish the game on Easy
Finish the game on Normal
Finish the game on Hard
Finish the game on Knightmare
Walk more than 1000 steps in the dungeons
Walk more than 5000 steps in the dungeons.
Walk more than 10000 steps in the dungeons.
Kill your first monster
Kill more than 10 monsters
Kill more than 50 monsters
Pick up more than 10 notes
Pick up more than 25 notes
Pick up more than 50 notes
Pick up more than 10 skulls
Pick up more than 25 skulls
Pick up more than 50 skulls
Find 22 Crystal Idols and access the secret level