TY  - BOOK
AU  - Koster, Raph
TI  - A theory of fun for game design
SN  - 9781932111972
U1  - 794.8 
PY  - 2005///
CY  - Arizona: 
PB  - Paraglyph Press, Inc
KW  - computer games
KW  - ethic of entertaiment
KW  - games design
ER  -