Here is the full list of all 43 Gigachess achievements.
Capture 250 Pawns with Knights under your command!
Capture 100 Pawns on Master difficulty in Endless mode!
Capture 25 Pawns on Master difficulty in Endless mode!
Capture 250 Pawns with Bishops under your command!
Capture 100 Pawns on Expert difficulty in Endless mode!
Capture 250 Pawns with Rooks under your command!
Capture 25 Pawns on Expert difficulty in Endless mode!
Capture 100 Pawns on Medium difficulty in Endless mode!
Capture 25 Pawns on Medium difficulty in Endless mode!
Capture 100 Pawns on Novice difficulty in Endless mode!
Play through the 3 lessons of the Tutorial!
Capture 25 Pawns on Novice difficulty in Endless mode!
Clear the first 8 stages of Puzzle Attack mode!
Clear stages 9 - 16 of Puzzle Attack mode!
Clear stages 17 - 24 of Puzzle Attack mode!
Clear stages 25 - 32 of Puzzle Attack mode!
Clear stages 33 - 40 of Puzzle Attack mode!
Clear the final block of Puzzle Attack mode!
Capture an impressive 1000 Pawns with Knights under your command!
Capture an impressive 1000 Pawns with Rooks under your command!
Capture an impressive 1000 Pawns with Bishops under your command!
Clear all 48 Puzzle Attack stages within par on Pro difficulty, you stunning logician!
Clear the 1st stage of Knight's Dungeon, you're off to a great start!
Unlock a hint, there's no harm in getting a little advice to help show the way!
Clear the 9 stages in the top left quadrant and unlock the 1st Bonus Tour!
Clear the 9 stages in the top right quadrant and unlock the 2nd Bonus Tour!
Clear the 9 stages in the bottom left quadrant and unlock the 3rd Bonus Tour!
Clear the 9 stages in the bottom right quadrant and unlock the 4th Bonus Tour!
Gain access to every Knight's Dungeon stage!
Teleport 8 Pawns in a single Pawnwarp!
Earn a grade of B or higher with a solo party on Novice difficulty in Endless mode!
Earn a grade of B or higher with a duet party on Medium difficulty in Endless mode!
Earn a grade of B or higher with a trio party on Expert difficulty in Endless mode!
Earn a grade of B or higher with a quartet party on Master difficulty in Endless mode!
Earn a grade of S with any size party on any difficulty in Endless mode!
Get any hero piece into its Hyper state in Endless mode!
Get a Knight, a Rook and a Bishop into their Hyper states simultaneously in Endless mode!
Get any hero piece Cursed during the first wave in Endless mode!
Survive until wave 10 with Hardcore enabled in Endless mode!
Earn a total of 50 Shieldguard points by protecting your hero pieces in Endless mode!
Get your hero pieces Cursed 10 times during a single run in Endless mode!
Survive until wave 10 with All Viper enabled in Endless mode!
Survive until reaching a hits target of 100 or greater with Spawncycle enabled in Endless mode!