Ace Online is a free-to-play MMO, with the option of buying in-game items via an "Item shop" that can be only accessed whilst in the "Hub City" or "Supply Shop" from bottom right corner of the screen or the shop. In the International Ace Online version, a player can only purchase the items from the "Item shop" using yecoins that has been bought through Yedang website via a Ace Online account. There are many items available to purchase that affect sgear's weapons (e.g. change the trail effect of the missiles), stats (e.g. resets or partial resets of stats), experience (e.g. increase experience rate) or others for a limited time. This item shop was made available to players on June 23, 2006.