Seattle-based Big Fish Games said its Web site had nearly 3.7 million visitors in May, a 60 percent increase from its April count. That increase has led comScore Media Metrix to rate the site as one of the top 10 gaining Web properties for that month-to-month period.

The company develops and distributes casual online games, the Web-based games played mostly on a personal computer (although the mobile side of this business is growing). Big Fish launched a German site last year and is working on sites in French, Spanish and Japanese.

Big Fish Games has grown in employee count as well, with 110 people at its offices on the top floor of Fisher Plaza.

By the way, you can expect to hear more about this industry here in Seattle next week. About 800 people are expected to attend the Casuality gaming conference, which runs June 27-29 at Benaroya Hall. Big Fish founder Paul Thelen is slated to speak at the conference on Tuesday.