Calcium Contract

30 achievements

Ultra Rare×7

Very Rare×11

Rare×4

Uncommon×5

Common×3

About Calcium Contract's achievements

Calcium Contract has 30 Steam achievements, 7 of them ultra-rare — unlocked by under 5% of players. The rarest is "Master of harvest", earned by just 2.6% of players. Below is the complete achievement list with global rarity and a full achievement difficulty breakdown.

Rarest achievement

2.6%

of players earned "Master of harvest"

🗺️ Community guides & walkthroughs

Community Ratings

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Difficulty—

Easy → Brutal

Enjoyment—

Meh → Loved it

Grindiness—

No grind → Huge grind

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All Calcium Contract achievements

30 achievements

Master of harvest

Get 5000 points in Eternal Harvest

Ultra Rare2.6%

Hexed

Get cursed 6 times in a single Eternal Harvest run

Ultra Rare2.9%

Industrial efficiency

Finish the Industrial District in under 90 seconds in one go (no rewinding, no loading)

Ultra Rare3.4%

Expert reaper

Get 3000 points in Eternal Harvest

Ultra Rare3.4%

Speedlunker

Finish the Caves in under 3 minutes in one go (no rewinding, no loading)

Ultra Rare3.6%

Caged forever

Finish the Mountain Halls without picking any yeller skulls

Ultra Rare3.8%

Frozen

Freeze 7 enemies at the same time

Ultra Rare4.6%

Sacred ground

Don't kill any cats in the Cat Temple

Very Rare5.2%

Treasure hunter

Catch all treasures in every level

Very Rare5.7%

Too eager

Get a little too eager when chasing the Serpent

Very Rare5.8%

Dead man's boom

Get killed by an exploding corpse

Very Rare5.9%

Seven in one

Kill 7 enemies with a single attack

Very Rare7.6%

Denied

Kill a treasure rooster with a scythe just before it disappears

Very Rare7.7%

Broken mirror

Catch a cursed rooster

Very Rare8.3%

Adept reaper

Get 1000 points in Eternal Harvest

Very Rare8.4%

Pong

Deflect 7 enemy projectiles with a single scythe swing

Very Rare8.6%

Timeless

Destroy all clocks in every level

Very Rare9.2%

Unstoppable

Get both the armor and the increased damage power-ups at the same time (campaign only)

Very Rare13.0%

Hydra

Let the Serpent spread as much as possible

Rare20.4%

Is this yours?

Kill an enemy with their own projectile

Rare21.2%

Serpenticide

Finish the game

Rare25.8%

Hissless halls

Leave no cat alive in the Cat Temple

Rare29.9%

3 birds with one scythe

Kill 3 roosters with a single scythe swing

Uncommon30.9%

The gravitational method

Cause an enemy to fall to their death

Uncommon31.2%

Reaper's due

Kill 1000 enemies

Uncommon35.1%

Anger management

Cause a berserker to kill another enemy

Uncommon42.5%

Just an illusion

Kill an invisible jester

Uncommon43.5%

Icarus

Kill a flying sniper just before they take their shot

Common55.3%

Gotcha!

Catch a treasure

Common64.6%

Ashore

Finish the Docks

Common94.6%