The firm, who operates over 600 GAME and GameStation stores nationwide, was worth £261.46 million a year ago, and now has shares worth £23.58m, according to Eurogamer.
It was added that its turnover remains at £1 billion annually, and that the video game market as a whole has shrunk by around 12% since last year.
Meanwhile, MCV has reported that following a recent downgraded revenue forecast for the year, it's seen share values sliced in half from 14.025p to 6.62p in a single week.
GAME remains a significant partner with publishers, offering lavish launches and nationwide store openings for big releases.
Modern Warfare 3, Battlefield 3 and FIFA 12 saw nationwide launch events in the last few months.
GAME also announced itself as the retail partner for cloud gaming service OnLive.
View photos from Modern Warfare 3's midnight launch below: