Here is the full list of all 34 Knockout Checkers Chamber achievements.
Win a round for the first time.
Get through 5 rounds.
Get through 10 rounds.
Unlock Ice Pieces.
Unlock Slug Pieces.
Unlock Jumping Pieces.
Unlock Stone Pieces.
Knock out 2 opponent's pieces at the same time.
Knock out 3 opponent's pieces at the same time.
Knock out 4 opponent's pieces at the same time.
Win the round with at least 4 alive pieces left.
Glue 3 opponent's pieces with a single Slug Piece.
Freeze a stone piece and knock out two opponent’s pieces with it.
Take the draw. Play a tie. Manage a stalemate!
Win a round, keeping alive a checker that was hit 5 times but remained on the board.
Have all types of pieces on the board at the same time.
Put the checker on its side.
Knock your own checker out of the board
Betray yourself and lose (knock out all your own pieces).
Win all rounds in the set with a maximal difficulty.
Win the second game with the Empress (Round 8), using only checkers-slugs.
Defeat the Empress in the 12th round with the last remaining checker.
Win the Round 13, using a set that reflects an opponent‘s set as a mirror.
Reach the Round 5.
Reach the Round 9.
Complete the campaign.
Defeat the Grand Marshal in Round 15, using only stone checkers.
Win Round 7, using only ice checkers.
While playing against the Empress in Round 12, knock out two checkers simultaneously.
Play a tie in Round 16.
Win the first game with the Empress (Round 4), using a set of completely different pieces (skins are taken into account).
Achieve 5 victories in a row.
Achieve 10 victories in a row.
Achieve 15 victories in a row.