Crysis 2 wasnt on Steam until all of its DLC was released. Crysis 3 will probably be in the same situation. When ME3 is all out of DLC then its possible it will make it's way to Steam.
No, no it won't. No digital downloadable EA game will ever be sold on Steam again (besides the ones that were before Origin). Crysis 2 came out before Origin was up and running, which is why it was available on Steam.
In fact, when Origin came out, EA pulled most of it's games off Steam. ME3 will never be on Steam (unless they shut down Origin for some reason).
Contrary to popular belief, opinions can be, and often are, wrong.
Valve pulled the games off of Steam when they changed their DLC rules and EA chose not to comply with them. EA would love to sell their games on Steam, which is why they put the complete version of Crysis 2 on there when they had no more DLC to sell.
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