This product is cheap and easy to configure.

You have the choice to add as many or as few different messages that will appear on the GUI. These messages can be as simple as “Join the group, and leave a like” or could provide special information about possible in game rewards or secret locations!

Its not speicifc to any specific genre of game, and can be adjusted to suit any of your needs, by changing font, color, size, location, transparency and the text itself.