Amongst other suggestions, you could also use the word components:
component
A physical item included in the game. E.g. the box itself, the board, the cards, the tokens, zipper-lock bags, inserts, rule books, etc. See also equipment.
(From Wikipedia: A glossary of terms used in board games)
This board game is very old, I hope all of its components are still in the box.
Your suggestion, i.e., equipment, could also be used:
equipment
Refers to physical components required to play a game, e.g. pieces, gameboard, dice.
(From Wikipedia: A glossary of terms used in board games)
This board game is very old, I hope all of its equipment is still in the box.
From mykindofmeeple.com:
What are the pieces in a board game called?
Collectively all the pieces in a board game are called components, or less commonly, equipment. Common pieces include chits, tiles, counters, chips, pawns, standees and miniatures. Individual pieces usually have names specific to each game.
From martinsplastics.net:
What are game boards made of?
Although board games from various parts of the world are different in form and content, components such as board, miniatures, cards, and dice have similar materials: die-cut cardboard, paper, and plastic.
See also: List of tabletop game components