If you are shopping a Gamma Doppler on a knife, stop at the thumbnail and open 3D inspect first. On knives this finish is Phase 1 (finish catalog 569): a multicolor electroplate built from black and silver metallics, blended to read like marble while still feeling sharp up close—danger tucked into the grain, not loud stickers or neon accents.

Release snapshot

June 15, 2016, with Counter-Strike’s Gamma Exposure update. The Gamma Weapon Case dropped the Gamma knife line the same day; Phase 1 is the baseline many collectors use when comparing phases side by side.

Who designed it

Valve—official built-in finish, not a Workshop author skin. Your buy decision should lean on inspect + float, not a creator name.

Where it drops

Tied to the Gamma Weapon Case. When you price on C5GAME or Steam Community Market, treat listings as drafts until inspect confirms phase, pattern placement, and wear.

What you are actually buying

• Category: knife
• Rarity: Mythical
• Finish type: multicolor electroplating
• Wear range: 0.00 – 0.08 (Factory New and Minimal Wear territory only)

Phase 1 must be verified in-game—other Gamma Doppler phases can look similar in flat icons. Because the cap is 0.08, most deals live in FN vs low MW; compare edge highlights, whether the marble flow stays continuous, and if blade transitions go muddy.

Shop guide verdict

Worth it if you want a restrained black-silver marble knife and you are willing to hunt templates inside the same phase. Pass or downgrade if the seller will not show inspect, the phase label is unclear, or the marble breaks awkwardly at the grip—at this rarity, pattern beats a “cheap FN” on paper.

Budget tip: In the 0.00–0.08 window, sub-0.01 floats and 0.06+ MW often sit in different price bands; pick the cleanest pattern you can afford within Phase 1 rather than chasing float alone.

Expert muttering

I rotate inspect like I am stress-testing a blade: three full turns, zoom the edge, then check the spine. Two Phase 1 listings with the same float can feel like different skins—marble landing zone is the whole story. Thumbnails lie; C5GAME and Steam recent sales are for sanity, not hype. Black-silver Gamma reads calm in lobby, still cuts in first person—that is the point.