--- title: "Chamber case on CSGOBig: odds, RTP & drops · gambatracker" description: "Chamber ($112.17) on CSGOBig, a CS2 case site: advertised RTP 90.00% from 11 items with odds. Item values at the site’s own prices, biggest and latest drops." url: https://gambatracker.com/cases/csgobig/406 rendered: 2026-11-11T18:40Z --- [Case sites](https://gambatracker.com/case-sites) / [CSGOBig](https://gambatracker.com/case-sites/csgobig) / [Chamber](https://gambatracker.com/cases/csgobig/406) # [CSGOBig](https://gambatracker.com/case-sites/csgobig) · Chamber A case on CSGOBig, first seen 3 Nov 2026. Every value is CSGOBig's own item price converted from csgobig coin at the rate on the site page. [24h](https://gambatracker.com/cases/csgobig/406?window=24h) [7d](https://gambatracker.com/cases/csgobig/406?window=7d) [30d](https://gambatracker.com/cases/csgobig/406) [All](https://gambatracker.com/cases/csgobig/406?window=all) Price · $112.17 · 112 CSGOBIG\_COIN Advertised RTP · 90.00% · EV $100.95 from 11 items Observed RTP, 30d · — · no counted openings Variance · 2.5× · of price², per opening Tail share · 27.0% · of openings carry half the EV Below price · 61.0% · of openings return less than the price ## Advertised vs observed · per window, 95% band and the advertised marker **No counted openings yet** Openings inside battles and free cases are listed but never counted. ## Windows · the test per window | Window | Openings | Observed | Dev. | Method | | --- | --- | --- | --- | --- | | [24h](https://gambatracker.com/cases/csgobig/406?window=24h) | 0 | — | — | — | | [7d](https://gambatracker.com/cases/csgobig/406?window=7d) | 0 | — | — | — | | [30d](https://gambatracker.com/cases/csgobig/406) | 0 | — | — | — | | [All](https://gambatracker.com/cases/csgobig/406?window=all) | 0 | — | — | — | Enough sample: 100 openings and 5 expected rare hits (odds method) or 1,000 openings (sample method). ## Items, odds and values · 11 items · odds sum to 1 · observed counts over 0 openings, 30 days Share of the expected value, most valuable first; colour is the item's rarity. | Item | Odds | Value | EV share | Observed | Expected | Hot / cold | | --- | --- | --- | --- | --- | --- | --- | | [★ Butterfly Knife \| Gamma Doppler (Factory New) (Phase 2) knife · covert · Phase 2](https://gambatracker.com/items/butterfly-knife-gamma-doppler-factory-new-phase-2) | 1 in 1,000 | $3,900 3,900 CSGOBIG\_COIN | 3.9% | 0 | 0.0 | — | | [★ StatTrak™ Karambit \| Doppler (Factory New) StatTrak · knife · covert knife](https://gambatracker.com/items/stattrak-karambit-doppler-factory-new) | 1 in 333 | $1,400 1,400 CSGOBIG\_COIN | 4.2% | 0 | 0.0 | — | | [★ StatTrak™ Huntsman Knife \| Doppler (Factory New) (Sapphire) StatTrak · knife · covert · Sapphire](https://gambatracker.com/items/stattrak-huntsman-knife-doppler-factory-new-sapphire) | 1 in 500 | $1,000 1,000 CSGOBIG\_COIN | 2.0% | 0 | 0.0 | — | | [AK-47 \| Hydroponic (Battle-Scarred) weapon · classified](https://gambatracker.com/items/ak-47-hydroponic-battle-scarred) | 1 in 42 | $500 500 CSGOBIG\_COIN | 11.9% | 0 | 0.0 | — | | [★ StatTrak™ Paracord Knife \| Case Hardened (Battle-Scarred) StatTrak · knife · #EB4B4B](https://gambatracker.com/items/stattrak-paracord-knife-case-hardened-battle-scarred) | 12.0% | $200 200 CSGOBIG\_COIN | 23.8% | 0 | 0.0 | — | | [AWP \| Silk Tiger (Minimal Wear) weapon · #d32ee6](https://gambatracker.com/items/awp-silk-tiger-minimal-wear) | 12.0% | $190 190 CSGOBIG\_COIN | 22.6% | 0 | 0.0 | — | | [Sticker \| ShahZaM (Gold) \| Boston 2018 sticker · #EB4B4B](https://gambatracker.com/items/sticker-shahzam-gold-boston-2018) | 12.0% | $140 140 CSGOBIG\_COIN | 16.6% | 0 | 0.0 | — | | [Sticker \| markeloff \| Cologne 2016 sticker · #4B69FF](https://gambatracker.com/items/sticker-markeloff-cologne-2016) | 15.3% | $48.00 48 CSGOBIG\_COIN | 7.3% | 0 | 0.0 | — | | [Galil AR \| Sugar Rush (Minimal Wear) weapon · classified](https://gambatracker.com/items/galil-ar-sugar-rush-minimal-wear) | 15.3% | $35.00 35 CSGOBIG\_COIN | 5.3% | 0 | 0.0 | — | | [Sticker \| coldzera (Foil) \| Krakow 2017 sticker · #8847FF](https://gambatracker.com/items/sticker-coldzera-foil-krakow-2017) | 15.3% | $12.00 12 CSGOBIG\_COIN | 1.8% | 0 | 0.0 | — | | [StatTrak™ Music Kit \| Neck Deep, Life's Not Out To Get You music kit · #4B69FF](https://gambatracker.com/items/stattrak-music-kit-neck-deep-lifes-not-out-to-get-you) | 15.3% | $5.00 5 CSGOBIG\_COIN | 0.8% | 0 | 0.0 | — | Values are CSGOBig's own item prices; EV share = odds × value ÷ EV. Hot / cold compares observed drops of each item with odds × openings; small expected counts are left blank. Odds read from `csgobig:api/cases/getDetails?id=406`, 11 Nov, 13:05 UTC. ## Biggest drops · from this case, by value **No drops yet** No drop from this case seen yet. ## Latest drops · newest first [All Latest drops →](https://gambatracker.com/drops?casino=csgobig&case=406) **No drops yet** No drop from this case seen yet. ## Observed RTP over time · daily, 30 days No history yet ## Catalog changes · price, advertised RTP and contents, per capture | Captured | Price | Advertised | Items | | --- | --- | --- | --- | | 3 Nov, 04:27 UTC | $112 | 90.00% | 11 | Each opening is tested against the capture in force when it happened; a price or odds change starts a new one. listed covert 0.3% covert knife 0.3% classified 17.6% #EB4B4B 24.0% #d32ee6 12.0% #4B69FF 30.5% #8847FF 15.3% 18+ **Case opening is gambling with skins as the currency.** At 90.0% RTP, every $100 put into cases returns $90.00 on average: an expected loss of $10.00 per $100, before any one lucky or unlucky opening. A big drop here says nothing about the next one. [BeGambleAware](https://www.begambleaware.org/) [Help & limits](https://gambatracker.com/responsible-gambling) How these figures are produced and labelled: https://gambatracker.com/llms.txt