Milestones

The Candy Crush Saga Wiki consider game milestones to be levels or episodes that either deserve to be recognized, or those that King gave special attention to based on their numbering or specific characteristic. This includes:

Levels 100, 200, 300, 400, and all others that are a multiple of 500.
The 100th level type, and all others that are a multiple of 500.
Other levels of significance, for example 1335 (2,000th level in the game including the removal of Dreamworld) and 4476 (first level of episode 300).
Every 100th episode and possibly other episode titles that have not changed due to the altered episode names that took place during April Fool's Day 2020.
The 100th specific mixed level types will also be recognized along with every multiple of 500, albeit without the category.

The countdown to level 10000[]

Levels 9990-9999 are the ten countdown levels, consisting of boards that resemble, but are not identical to the millennial episodes in order. They span two episodes, and consist the last six levels of Episode 667 (Fantastic Forest) and the first five levels of Milestone Meadow. As of now, Levels 9990-9998 were all redesigned to regular levels, leaving only Level 9999 and Level 10000 as milestones.
- The millennial level referenced correspond to the unit digit of the countdown level plus 1.
1. Level 9990 is derived from Level 1000. Both have a 1K. Only Level 9990 has a custom scoring algorithm of 1000 points a match.
2. Level 9991 is derived from Level 2000. Both have a 2K. Only Level 9991 has a custom scoring algorithm of 2000 points a match.
3. Level 9992 is derived from Level 3000. Both have a 3K. Only Level 9992 has a custom scoring algorithm of 3000 points a match.
4. Level 9993 is derived from Level 4000. Both have a 4K. Only Level 9993 has a custom scoring algorithm of 4000 points a match.
5. Level 9994 is derived from Level 5000. Both have a 5K. Only Level 9994 has a custom scoring algorithm of 5000 points a match.
6. Level 9995 is derived from Level 6000. Both have a 6K. Both have a custom scoring algorithm of 6000 points a match.
7. Level 9996 is derived from Level 7000. Both have the name Seb written out in some way or form, a tribute to Candy Crush Saga's co-founder Sebastian Knutsson. However, only Level 9996 has a custom scoring algorithm of 7000 points a match.
8. Level 9997 is derived from Level 8000. Both have a 8K. Both have a custom scoring algorithm of 8000 points a match.
9. Level 9998 is derived from Level 9000. Both have a 9K. Both have a custom scoring algorithm of 9000 points a match.
10. Level 9999 is a unique level where the open spaces spell out four 9's arranged in a square. This level has a custom scoring algorithm of 9999 points a match.
Level 10000 is so significant of a milestone that several events were created before and after the celebration of this episode. Anyone who has passed this level will receive a "10000" ribbon permanently on their profile picture.

Special celebrations[]

These are "true" milestone levels, in which the level design directly references their own level, episode, or a major event in CCS. All millennial levels as of now are special celebrations. Only the completion of millennial levels yield a special reward.

Only the first three centennial episode openers are special celebrations, though there is another episode opener that is a special celebration. There are five miscellaneous special celebrations which a major new feature or celebration was introduced. There are two exclusive levels celebrating the new year. 3K and 6K are both released around Christmas and New Year's time, furthermore both are adjacent to a centennial episode.

In order of release, they are:

Level 200 and Sweet Surprise - The fifteenth episode is dedicated to this level (also episode finale) and featured a cake with candles spelling out a 200. This is also the first anniversary of the game.
Level 500 - Inspiration for Dreamworld (also an episode finale, and one of the former hardest levels in the game).
Happy New Year (2014) - Not playable, but present on a special Candy Crush video. This is the first 2-colored level in the entire game.
Level 200 (Dreamworld) and Sweet Dreams. This was the Dreamworld counterpart of Sweet Surprise. It was the second anniversary of the game.
Level 666 - Inspiration for its level design, orders, and move count. Much later since its release, an inspiration for ending Dreamworld.
Level 500 (Dreamworld) - All levels prior to the release of Dreamworld now have a Dreamworld counterpart.

Level 1000 - First four-digit level. It is specifically designed for a large candy order and used to be an arrangement based on the Roman number M. When the level got redesigned, the Sugar Chests are arranged into a giant '1K'.
Happy New Year (2016) - Celebrating new year, only available on one day (31st December 2015). This level has only one move, and consists of 16-move Candy Bombs.
Level 1476 - 100th episode opener. The board has a fixed candy layout, consisting of green candies making up "100". Also the Reality level which requires the greatest number of wrapped candies and has the lowest one star target score at 100 points. The episode is also the first Lunar New Year episode in the game.
Level 1641 - 111th episode opener. The board has fixed candy layout with three 1 with different colour and three different colour of regular candy orders that require 111 candies each.
Level 2000 - The 2K level. It is also an episode finale. The colour bombs are arranged into a giant '2K', 200 purple candies are required, and the one-star target is 2000 points.

Level 2976 - 200th episode opener. Furthermore, this is an opener of a New Year's episode, and its episode is the middle member of a trio of celebratory episodes celebrating New Years 2018. Locked blue and orange candies arrange into a '200' with the middle '0' above the left '2' and the right '0', and 200 blue candies needs to be matched. The next episode contains 3K.
Level 3000 - The 3K level, released alongside 200. This is the first level released to require Jelly Fish orders. 333 Jelly Fish are required, which can be obtained from Bobbers (which are released in the 2000s) arranged in a giant "3K".

Level 4000 - The 4K level. The Candy Cane Fence, released in the 3000s, are arranged into a giant '4K' with '4' on the top left and 'K' on the bottom right.

Level 4476 - 300th episode opener. The Candy Canes form a "300" with digits cascading downwards. The elements inside the digits are Waffles which are required to be cleared, and the Candy Canes separate the main board from the digits. Unfortunately, this is the last centennial episode opener to celebrate its episode number.

Level 5000 - The 5K level. The Crystal Candies, released in the 4000s, surrounded by Candy Cane Curls, are arranged in a giant '5K' with '5' on the bottom left and 'K' on the bottom right. A special video was made on the official YouTube channel commemorating this level.

Wintry Workshop - the 400th episode. Unlike the previous three centennial episodes, none of its levels celebrate "400". However, this episode was released at the same time as Soda Soiree, so Sugar Coats were released along with this episode. This is also the final legitimate Christmas episode in the game.
Level 6000 - The 6K level. See Wintry Workshop. Ironically, they are absent in this level. Consists of tiles covered by Crystal Candies and Candy Cane Fences spelling out a "6k". First level to have a custom scoring algorithm.

Level 7000 - The Seb level. Only millennial episode where the text does not follow the trend; this is actually a tribute to Seb, who passed away shortly before the release of this level.

Level 7777 - A level which heavily references the digit '7' from its board layout to its score requirements.

Level 8000 - The 8K level. Consists of Liquorice Swirls encased on Crystal Candies spelling out a "8K" aligned diagonally downward. Those on the "8" and on the first stroke of "K" are locked.
Level 9000 - The 9K level. Consists of Sugar Chests encasing Bubblegum Pops on the "9" and Rainbow Twists on the "K". First level to officially have an alternative colour scheme.

Levels 9990-9999 are the ten countdown levels, consisting of boards that resemble, but are not identical to the millennial episodes in order. They span two episodes, and consist the last six levels of Episode 667 (Fantastic Forest) and the first five levels of Milestone Meadow. They precede the ultimate milestone, Level 10000. As of now, only Level 9999 and Level 10000 remain as milestones.