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Free Winter Offensive Weapon Case opening simulator: $12.91 open cost, $6.07 EV, -52.94% Unbox ROI, 78 drops across 4 rarities. Test odds, history and win rate without spending keys. Updated June 3, 2026. Research and entertainment only.
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Winter Offensive Weapon Case
Simulate Winter Offensive Weapon Case opens at $12.91 ($10.42 case + $2.49 key) without spending real money. Compare runs to $6.07 EV and -52.94% Unbox ROI from the Details tab.
The Winter Offensive Weapon Case simulator rolls 78 outcomes across 4 rarities at $12.91 per open, tracking session win rate against $6.07 EV.
Sessions deviate from $6.07 EV and 8.91% profit chance — that variance is the point. Lucky sims do not prove $12.91 opens are +EV.
Hold Winter Offensive Weapon Case at $10.42 with 0.00% Investing ROI on Details; simulate opens at -52.94% Unbox ROI here — different intents.
CSProfit models Winter Offensive Weapon Case at $6.07 EV — faster than real opens, not a profit promise.
It rolls 78 Winter Offensive Weapon Case drops using the same weights as Details, values each hit at current prices and charges $12.91 per simulated open against $6.07 EV.
★ Bayonet | Fade is 0.00% (about 1 in 25000). ★ Karambit | Crimson Web, ★ M9 Bayonet | Crimson Web, ★ M9 Bayonet | Night lead average value; common tiers dominate the 78-item pool across 4 rarities.
Yes — virtual opens use the $12.91 modeled cost ($10.42 + $2.49) without charging your Steam wallet.
Detail EV is $6.07 (-$6.84 vs $12.91 open). Individual sims often land below that because commons dominate 8.91% profit chance.
It uses CSProfit's 78-item probability table for Winter Offensive Weapon Case (updated June 3, 2026). It models randomness but is not Valve's server-side roll.
Modeled exp. profit is -$6.84 on $12.91 opens with -52.94% Unbox ROI. Most single opens still return items worth less than cost.
Click Open Once ($12.91 modeled) or Quick Sim for bulk runs. Compare history to $6.07 EV and 8.91% win benchmark.
You can hit ★ Karambit | Crimson Web ($4,561.00 avg.) in sim, but 0.00% rare drops remain unlikely. Session wins ≠ -52.94% long-run ROI.
Run 50+ Quick Sims, chart rarity distribution and compare win rate to 8.91% and EV to $6.07 — one lucky streak is noise.
The web tool is free. Real Winter Offensive Weapon Case opens still cost $12.91 (USD) on Steam if you choose to open for real.