This study investigates if the user's motivation for different game platform affects their tendency for game addiction. Game platforms profoundly relate to characteristics of game contents and the way games are played. While much game market expansion is driven by technological advancement of game platforms such as video and audio, the effect game platforms have on the way game is played is largely overlooked. A survey was conducted to compare PCs, consols, smart phones and smart pads as major game platforms and how users have different motivations for playing those platforms which is expected to associate with the degree of their game addiction. Six motivations were extracted - mobility, contents characteristics, media characteristics, sociality, game interface, and economic profitability. Across the four game platforms, all motivations except for economic profitability were proven to be meaningful predictors of game addiction.