J.A.C.K.

J.A.C.K.

18 achievements

Ultra Rare×9

Very Rare×5

Rare×4

About J.A.C.K.'s achievements

J.A.C.K. has 18 Steam achievements, 9 of them ultra-rare — unlocked by under 5% of players. The rarest is "Curvature", earned by just 1.8% of players. 2 SteamVault members have 100%-completed it so far. Below is the complete achievement list with global rarity and a full achievement difficulty breakdown.

Rarest achievement

1.8%

of players earned "Curvature"

SteamVault 100%s

2

members fully completed it

🗺️ Community guides & walkthroughs

Community Ratings

No ratings yet

Difficulty—

Easy → Brutal

Enjoyment—

Meh → Loved it

Grindiness—

No grind → Huge grind

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All J.A.C.K. achievements

18 achievements

Curvature

Create 250 curves (Quake 3).

Ultra Rare1.8%

Effectives

Create an effect in Effects Editor (Quake 3).

Ultra Rare2.1%

Incrementalist

Save 25 incremental versions of a single project.

Ultra Rare2.6%

Pretty Solid

Create 2500 solid entities.

Ultra Rare2.7%

Block Party

Create 5000 solid blocks.

Ultra Rare3.1%

Triangulator

Triangulate 10 complex solid structures.

Ultra Rare3.8%

Group Theory

Create a group consisted of 10 nested groups.

Ultra Rare4.0%

Fusion Cuisine

Merge 16 solids in a single Merge operation.

Ultra Rare4.9%

Splitter

Split 50 faces.

Ultra Rare4.9%

Point Blank

Place 1000 point entities.

Very Rare6.0%

Pathfinder

Create a path using the Path Tool.

Very Rare8.3%

Holloween

Make 25 solids hollow.

Very Rare11.4%

Unpacker

Extract textures (Quake or Half-Life).

Very Rare12.2%

Chisel Me Out

Carve 100 solids.

Very Rare12.5%

Spray Paint

Place 50 decals (Half-Life).

Rare18.2%

Clipper

Cut 100 solids using the Clipping Tool.

Rare24.7%

Ooops!

Get an "Invalid solid structure" error.

Rare25.6%

Export Services

Export 100 MAP files.

Rare28.5%