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Halo: The Master Chief Collection Achievements

Official Steam achievement definitions and latest reported global unlock rates, ordered from rarest to most common.

Total achievements700

Rarest rate0.500%

Ultra rare56

Last checkedSep 28, 2026

Delayed official data

Rates and award counts were last observed on Sep 28, 2026.

121

Man on the Moon

Halo 3: He's watching you.

Very rare

1.30%last reported global rate

122

Megg

Halo CE: It's a sign.

Very rare

1.30%last reported global rate

123

Milk Carton

Halo 3: Find the poster of the missing man.

Very rare

1.30%last reported global rate

124

My Work is Done

Halo 2: Collect the Librarian toy in Uprising.

Very rare

1.30%last reported global rate

125

Nice Work Dawg!

Earn a total of 2,500 Assist medals in multiplayer.

Very rare

1.30%last reported global rate

126

Pyrrhic Solution

Halo 2: Collect the Didact toy in The Great Journey.

Very rare

1.30%last reported global rate

127

Raging in the Dark

Halo 4: Beat the par time on Forerunner.

Very rare

1.30%last reported global rate

128

Rule Your Thirst!

Halo 2A MP: Found and destroyed the BLAST soda can on Warlord.

Very rare

1.30%last reported global rate

129

Scarab Slide

Halo 3: Beat the par time on The Covenant.

Very rare

1.30%last reported global rate

130

Shut. Down. Everything.

Halo 4: Beat the par time on Shutdown.

Very rare

1.30%last reported global rate

131

Skeet Shooter

Halo 2A MP: Killed 15 opponents that were airborne from a Man Cannon.

Very rare

1.30%last reported global rate

132

Skulltaker Halo 2: Anger

Halo 2: Find and claim the Anger Skull on Legendary.

Very rare

1.30%last reported global rate

133

Skulltaker Halo 2: Black Eye

Halo 2: Find and claim the Black Eye Skull on Legendary.

Very rare

1.30%last reported global rate

134

Skulltaker Halo 2: Mythic

Halo 2: Find and claim the Mythic Skull on Legendary.

Very rare

1.30%last reported global rate

135

Squid Jackpot!

H3: ODST: Beat the par score on Kikowani Station.

Very rare

1.30%last reported global rate

136

T-Rex

Halo CE: Find the hidden Rex sign on The Maw.

Very rare

1.30%last reported global rate

137

Thirst Locked Down!

Halo 2A MP: Found and destroyed the BLAST soda can on Lockdown.

Very rare

1.30%last reported global rate

138

Why Am I Here?

Halo 2: View this hidden message on the classic Beaver Creek map.

Very rare

1.30%last reported global rate

139

Worship Your Thirst!

Halo 2A MP: Found and destroyed the BLAST soda can on Shrine.

Very rare

1.30%last reported global rate

140

Wraith Hunter

Halo CE: Destroy four Wraith tanks in Assault on the Control Room with the Scorpion tank.

Very rare

1.30%last reported global rate