Kallax from IKEA is great for game books. 15x15 shelves double reinforced pegs and rock steady under heavy load of books. I just put mine up and filled them. Heres a pic
22 Best Hacks for Kallax Shelf - Hello Lovely | Ikea kallax shelf, Home decor, Shelves in bedroom
KALLAX Shelving unit with 4 inserts, white, 147x112 cm - IKEA
IKEA EXPEDIT and KALLAX book shelves, Furniture & Home Living, Furniture, Shelves, Cabinets & Racks on Carousell