Development support and evaluation of on-line games Hitoshi Matsubara （Professor , School of Systems Information Science , Future University-Hakodate） URL； On-line games are considered to become more popular in the world, but there are several serious problems (rises of development costs, bad influence on young generations, etc.).Japan are leading video game industry now, but is likely to lose the position in the near future. This project evaluates on-line games scientifically and establishes methodology of effective development of on-line games. We want to realize socially acceptable on-line games.