Today marks the open beta launch of CardMon Hero, the free-to-play MMO that features a card summoning battle system. All players will be able to try out the game once the doors open at 5 p.m. PST. You can start downloading the client on the game's official site in preparation for the launch.

In celebration of the milestone, the CardMon Hero team has released a batch of new screenshots, which you can view in our gallery. If you haven't seen it yet, check out the latest gameplay trailer after the jump.