Steam discount available.
Free-to-play title Age of Empires Online is now available on Steam.
Celebrating the release, Greek, Egyptian, and Persian in-game civilisations will be available for 50 per cent off, at £3.25 each.
Users will still need a Games for Windows account to play the online RTS title however.
Age of Empires Online released last year, and has since been made available via retail and through the game's official website.