Case Opening Guide, Odds & Virtual-Credit Demo

01 / PLAY & OBSERVE

Case Opening virtual demo

Educational model

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02 / UNDERSTAND THE CHOICE

Case Opening guide

The mechanic

A case opening draws one item from a weighted table. The five reference outcomes here use fictional labels, probabilities and values, not Valve odds or market prices. Every item value is a gross return relative to a one-unit case cost. The full probability-weighted table determines expected net; a rare headline item cannot establish a case’s value by itself.

The decision to notice

Compare case cost, disclosed probabilities, item values, withdrawal rules, and fees before treating the animation as value.

Guide category: CS2 Exclusive
Guide volatility: High
Guide difficulty: Easy
Documented round speed: Not documented
Operator autoplay metadata: Not documented

03 / CHECK THE MODEL

Odds & mathematics

Probability describes frequency, gross return includes the original stake, and player net subtracts it. House edge is a long-run cost, not positive player expected value. None predicts a session.

Educational reference only, not operator odds or a claim about any independent lab. Operator limits, timing, availability and current fairness are not specified.
All payouts are gross (stake-inclusive). EV is player net per 1 unit staked; house edge = -EV. Decimals are rounded only for display.
Fully fictional five-outcome table; outcome probabilities sum to 1. Each row repeats the whole-case EV/edge because individual rarity outcomes are not separately purchased wagers.
Popularity is unmeasured (legacy value 0). Difficulty is an editorial learning label; volatility describes the reference payout structure, not an independently measured operator rating.

Guide reference examples

These references are separate from the interactive model. A single row is not a complete distribution, particularly for pushes, multiple payouts, item values or fees. Missing expected net is not computed from an isolated row.

Guide examples, not current operator odds. Read the assumptions and payout basis for each row.
Scenario	Reference probability	Quoted payout & basis	Reference house edge	Expected player net / credit	Assumptions
Fictional common	70%	0.25x grossGross return (includes stake)	14.5%	-0.145 units per 1 staked	Case cost = 1 unit. Exclusive outcome weights 70%,20%,8%,1.9%,0.1% sum to 100%; fictional gross item values 0.25,1,3,10,50 units. No market prices, rarity standards or additional fees. EV and edge refer to the entire case, not buying one outcome. All payouts are gross (stake-inclusive). EV is player net per 1 unit staked; house edge = -EV. Decimals are rounded only for display.
Fictional uncommon	20%	1x grossGross return (includes stake)	14.5%	-0.145 units per 1 staked	Case cost = 1 unit. Exclusive outcome weights 70%,20%,8%,1.9%,0.1% sum to 100%; fictional gross item values 0.25,1,3,10,50 units. No market prices, rarity standards or additional fees. EV and edge refer to the entire case, not buying one outcome. All payouts are gross (stake-inclusive). EV is player net per 1 unit staked; house edge = -EV. Decimals are rounded only for display.
Fictional rare	8%	3x grossGross return (includes stake)	14.5%	-0.145 units per 1 staked	Case cost = 1 unit. Exclusive outcome weights 70%,20%,8%,1.9%,0.1% sum to 100%; fictional gross item values 0.25,1,3,10,50 units. No market prices, rarity standards or additional fees. EV and edge refer to the entire case, not buying one outcome. All payouts are gross (stake-inclusive). EV is player net per 1 unit staked; house edge = -EV. Decimals are rounded only for display.
Fictional very rare	1.9%	10x grossGross return (includes stake)	14.5%	-0.145 units per 1 staked	Case cost = 1 unit. Exclusive outcome weights 70%,20%,8%,1.9%,0.1% sum to 100%; fictional gross item values 0.25,1,3,10,50 units. No market prices, rarity standards or additional fees. EV and edge refer to the entire case, not buying one outcome. All payouts are gross (stake-inclusive). EV is player net per 1 unit staked; house edge = -EV. Decimals are rounded only for display.
Fictional special	0.1%	50x grossGross return (includes stake)	14.5%	-0.145 units per 1 staked	Case cost = 1 unit. Exclusive outcome weights 70%,20%,8%,1.9%,0.1% sum to 100%; fictional gross item values 0.25,1,3,10,50 units. No market prices, rarity standards or additional fees. EV and edge refer to the entire case, not buying one outcome. All payouts are gross (stake-inclusive). EV is player net per 1 unit staked; house edge = -EV. Decimals are rounded only for display.