The next games to join Nexon's Steam catalog are Combat Arms and Atlantica Online, an FPS and MMO RPG, respectively. The former was actually expected to hit Steam in June with the F2P juggernaut's 2D brawler Dungeon Fighter Online, but couldn't quite make it.
With Combat Arms celebrating its fourth anniversary, plenty of in-game events, specials, and weapons have been planned for the month of July. The community is actually pretty huge, clocking in at more than 5 million registered users, many of whom are pretty active, believe it or not.
Atlantica Online, if you're not familiar with the game, is a fantasy MMO from Korean-developer NDOORS and published through Nexon. Players are dropped in an "alternate-reality Earth," where monsters from history and known lore are very real and very killable. Mind the graphical quality -- Atlantica has been around since 2008.
No word on which Nexon game will be added next. The whole deal began with Vindictus back in mid-June.