The browser-based MMORPG Domain of Heroes may be free to play, but a percentage of in-game purchases will now go to some good causes.

According to a press release, 5% of all purchases made in Domain of Heroes will go to Child's Play or Women in Games International, depending on the player's preferences. Currently, users have raised more than $500 since the system launched.

Domain of Heroes is a text-based game that requires only a browser to play. There are currently more than 18,000 registered players who have created characters by picking from 27 classes and 30 races. You can read the full press release regarding the announcement below.