** ASX-listed shares of Light & Wonder LNWO.PK, LNW.AX fell as much as 3.2% to A$121.08, logging its weakest session since April 14
** Global games firm said it has received notice of a class action proceeding at the Supreme Court of Victoria, Australia
** Adds, class action alleges co's claims about its "Dragon Train" game lacked reasonable grounds
** Says proceedings brought on behalf of shareholders who bought stake in co's Chess Depository Interests (CDI)
** LNW will defend the proceeding
** Stock down over 20% this year, including the day's move
(Reporting by Rajasik Mukherjee in Bengaluru)
((Rajasik.Mukherjee@thomsonreuters.com))