Prisma Case
Simulator
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Prisma Case
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Free Prisma Case opening simulator: $3.49 open cost, $2.83 EV, -18.81% Unbox ROI, 69 drops across 4 rarities. Test odds, history and win rate without spending keys. Updated June 5, 2026. Research and entertainment only.
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Prisma Case
Simulate Prisma Case opens at $3.49 ($1.00 case + $2.49 key) without spending real money. Compare runs to $2.83 EV and -18.81% Unbox ROI from the Details tab.
The Prisma Case simulator rolls 69 outcomes across 4 rarities at $3.49 per open, tracking session win rate against $2.83 EV.
Sessions deviate from $2.83 EV and 9.21% profit chance — that variance is the point. Lucky sims do not prove $3.49 opens are +EV.
Hold Prisma Case at $1.00 with 0.00% Investing ROI on Details; simulate opens at -18.81% Unbox ROI here — different intents.
CSProfit models Prisma Case at $2.83 EV — faster than real opens, not a profit promise.
It rolls 69 Prisma Case drops using the same weights as Details, values each hit at current prices and charges $3.49 per simulated open against $2.83 EV.
★ Navaja Knife | Doppler is 0.01% (about 1 in 20000). ★ Talon Knife | Doppler, ★ Talon Knife | Doppler, ★ Talon Knife | Doppler lead average value; common tiers dominate the 69-item pool across 4 rarities.
Yes — virtual opens use the $3.49 modeled cost ($1.00 + $2.49) without charging your Steam wallet.
Detail EV is $2.83 (-$0.66 vs $3.49 open). Individual sims often land below that because commons dominate 9.21% profit chance.
It uses CSProfit's 69-item probability table for Prisma Case (updated June 5, 2026). It models randomness but is not Valve's server-side roll.
Modeled exp. profit is -$0.66 on $3.49 opens with -18.81% Unbox ROI. Most single opens still return items worth less than cost.
Click Open Once ($3.49 modeled) or Quick Sim for bulk runs. Compare history to $2.83 EV and 9.21% win benchmark.
You can hit ★ Talon Knife | Doppler ($3,254.65 avg.) in sim, but 0.01% rare drops remain unlikely. Session wins ≠ -18.81% long-run ROI.
Run 50+ Quick Sims, chart rarity distribution and compare win rate to 9.21% and EV to $2.83 — one lucky streak is noise.
The web tool is free. Real Prisma Case opens still cost $3.49 (USD) on Steam if you choose to open for real.