EA did not remove Dragon Age 2 from Steam - Valve did.
EA's David DeMartini, senior vice president of global e-commerce, said Dragon Age 2 had fallen foul of "restrictive terms of service" on Steam.
"At EA, we offer our games and content to all major download services including GameStop, Amazon, Direct2Drive and Steam," said DeMartini in a statement provided to Eurogamer.
"Unfortunately, Steam has adopted a set of restrictive terms of service which limit how developers interact with customers to sell downloadable content.
"No other download service has adopted this practice," he added. "Consequently some of our games have been removed by Steam.
"We hope to work out an agreement to keep our games on Steam."
Dragon Age 2 disappeared from Steam at the same time the game's Legacy DLC was released. Dragon Age 2 sells additional content through an in-game store and it's this, we presume, that violated Steam's rules.
The PC and Xbox 360 versions of the Legacy DLC can be bought and downloaded now. The slightly delayed PS3 version of the Legacy DLC was added to the PlayStation Store this morning and is available now.
Legacy offers new areas outside of Kirkwall and Sundermount to explore, including a prison established by those Blight-beaters the Grey Wardens. The Legacy story delves into Dragon Age 2 hero Hawke's lineage. The Legacy loot includes a tasty class-specific weapon.
EA's Crysis 2 was removed from Steam for violating similar rules. Neither game's Steam disappearance has anything to do with EA's Origin digital store push, apparently.