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All Time-Travel Games

If you went back, how much could you make? Free browser games built on real historical records, from 1-minute price quizzes to 5-minute blind-investing games.

All money and scores in the game are virtual; nothing here is investment advice. Sources and rules · Privacy policy

How were these games made?

Every game at Time Machine Society starts from one question: "If I could go back, how much could I make?" Everyone has wondered what would have happened if they'd bought that stock or kept those sneakers in the box. These games let you test that daydream against real records.

The numbers aren't made up. Stocks use dividend-reinvested, split-adjusted prices; luxury goods use list-price histories and real auction results; art uses two recorded sales of the same work; and old prices come from news reports and official fare histories. Because the math is simplified to make a game, each result screen and the guide explain the basis and the limits.

Pick by play time

1–3 minute games are quick quizzes about old prices, mostly everyday prices in Seoul, South Korea: was a 1988 ice cream more expensive than a subway ride? Why would pulling out a ₩50,000 note in 2008 make you look suspicious?

5-minute games are blind-card games where you spread virtual money across hidden cards. When Facebook, Uber or Korea's Baemin show up only as "a college-only social network" or "an app full of takeout flyers," even people who know how things turned out find it surprisingly hard to choose. That hesitation is the point.

15-minute-plus simulations cover US stocks, Hollywood movies, famous sports matches and Korean real estate, hopping through decades round by round.

Why the journey beats the result

Once you know the outcome, old choices look obvious. But the clues in these games are written close to what people saw at the time, so the old uncertainty comes back: "Will this really take off?" Next to every breakout company sits one that looked just as promising and vanished; next to a bag that rose tenfold sits a sneaker now selling below retail. Along the way you'll feel the gap between knowing the future and choosing well.