The top 10% are given 5 flames, the next 20% 4 flames, the middle 40% 3 flames, the next 20% 2 flames and the bottom 10% 1 flame. The pages are then ranked in order from most significant increase down to most significant decrease. The number of visitors in the most recent month is compared with the average per month over the preceding five months, and the significance of the change is estimated using a statistical technique described here. (The top 6 games under this ranking are also listed on the home page as 'most popular games'.)
Top 10% get 5 hearts, next 10% 4 hearts, next 20% 3 hearts, next 30% 2 hearts, bottom 30% 1 heart. Games are ranked in order of the average number of people (actually different IP addresses) per month who visited the game rules page in the last 6 months. Subjective assessment of the editor combining two factors: how difficult or complex the rules are, and how difficult it is to learn to play the game well. Further 2-player games can be found among the collection of invented games and on the commercial games page.
The above are the editor's recommendations, but tastes differ and you may prefer to explore the full index of traditional 2-player games. From its British origins over 300 years ago this game has spread throught the English-apeaking world. Classic game in which players score on a peg board for making pairs, runs and sets of cards that add up to 15 during the play, in their hands, and in the 'crib'.