What the number is built from
Most operators derive a rating from their escape rate — the share of groups who finish inside the hour. A room that 70% of groups escape is a 2/5; 40–50% is a 3/5; 20–30% is a 4/5; under 15% is a 5/5. That is the theory. In practice the number is also set by marketing, by the owner’s pride and by how many hints the game master hands out unasked, which is why a 5/5 in a suburban Toronto plaza and a 5/5 in the ByWard Market can be two very different hours.
A few operators publish the escape rate itself, and the average finishing time. When they do, trust those numbers over the stars.
Why ratings don’t travel between operators
Three things make ratings incomparable. First, the population: a room played mostly by corporate groups on a Tuesday afternoon has a lower escape rate than one played by enthusiasts on a Saturday night, and the rating reflects the customers, not the room. Second, hint policy: unlimited hints inflate escape rates and deflate ratings. Third, honesty: some cities rate up. In our notes, Calgary and Ottawa operators rate conservatively, Toronto’s downtown tier rates generously, and Montréal rates by the French version of the room, which is harder than the English one.
The rating tells you how the last hundred groups did. It says nothing about who they were.
Linear versus non-linear rooms
A linear room hands you one puzzle at a time; you cannot work on the second until the first is solved. A non-linear room opens several paths at once and asks you to bring them together. The rating rarely says which. It matters: a linear 3/5 suits pairs and small groups, because there is nothing for a sixth person to do, while a non-linear 3/5 needs four or more people or it becomes a 4/5 through sheer volume. Ask. Operators know exactly which kind they have built and will tell you.
How hints change the number
Consider two rooms with the same locks and the same escape rate. One gives three hints; the other gives unlimited hints but adds a minute to your time for each. The first is harder for beginners and easier for veterans, who ration hints well. The second is the reverse. If a listing mentions “limited hints”, treat the rating as a half-point higher for a first-time group. If it mentions a time penalty, treat it as a half-point lower.
Reading the rating for your group
- Count experience. If more than half your group has never played, cap yourselves at 3/5 regardless of enthusiasm.
- Ask whether the room is linear. Pairs and trios want linear; five or six want non-linear.
- Check the hint policy and adjust by half a point as above.
- Adjust for city. Add half a point in Calgary and Ottawa; subtract half in downtown Toronto and the Old Port.
- Adjust for language if you are playing in your second language. Add a full point.
- Pick the room where your adjusted number is 3. That is where the hour is fun rather than either trivial or grim.
A note on “escape rates”
An escape rate is a marketing number until you know the hint policy and the average group. A 12% escape rate with three hints and a mostly-corporate customer base might be a perfectly reasonable room for four enthusiasts. A 60% rate with unlimited hints and a mostly-enthusiast base might defeat a birthday party. Use the rate as a conversation starter with the operator, not as a verdict.