Björk, Staffan. <br/><br/>
Patterns in game design / 
Staffan Björk and Jussi Holopainen. 
 - Hingham, Mass. :  Charles River Media,  2004. 
 - vii,423p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>1584503548 (pbk.) :  £29.95 9781584503545 
<br/><br/><label>Nat. Bib. No.: </label>GBA475656  bnb 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer games--Design.<br/>Computer games--Programming.