Last years have seen a growing interest on the Serious Games topic - and in particular on Games for Health - from both scientific and industrial communities. However not only the effectiveness of this kind of games is not yet demonstrated but the distribution and adoption of these games from the normal public is still very low. In this paper we present a design strategy we adopted in on the occasion of the development of a game for hemiplegic rehabilitation named "Hammer and Planks". This game strategy allowed us to create a "game for all", as will be demonstrated by the example of the usage of the game on the occasion of a game event in the south of France.