Deal or No Deal is the game show with no questions: 26 briefcases, each with a hidden amount from a penny to a million, and you pick one to keep. Then you open the others, a few at a time, and after each round the banker offers you money to stop. Take the deal, or open more cases and gamble that the big amounts are still in play — ideally, in yours.
This is the official-style browser version with the show's format: 26 cases, the banker's offers, and the reveal at the end of what was in your case. It is pure probability dressed as drama, and it is exactly as tense as the TV show.
From the average of the amounts still on the board, discounted early in the game to tempt you to continue and closer to the true average late on. Big amounts opened lower the offer sharply.
Refuse early offers, watch the ratio of big amounts remaining, and take the deal once the offer is close to the average of what's left. It's a probability game; the drama is in ignoring that.
Yes. It is a click-only game that runs in the browser with nothing to install.