I have Company of Heroes as a retail copy. I was wondering if it is possible for me to make this a Steam copy somehow? I was thinking if I buy the addon pack, Opposing Fronts, I might be able to do that. Does anyone know if this is possible? Some Steam forum users suggest that it may not work. Although I am sceptical.
Steam – Is it possible to install Opposing Fronts via Steam
company-of-heroessteam
Related Solutions
This depends entirely on the game. Steam refers to this practice as 'pre-loading' and they do it for select titles. In the specific case of Civ V, yes, you can preload. For other titles, you can check that games respective forums at the Steam community site to get the answer in most cases.
I haven't installed Origin yet, but I would say it isn't even technically possible, short of reversing the game, Steamworks and the Origin interface.
Steam and Origin are different DRM systems with easily different interfaces between the game and the distribution system (i.e. ways for the program to ask "what's the user's avatar?", "does the user own this game?", "does the user have this DLC?", "please unlock this achievement", "please begin the purchase of this hat", etc.)
You can't just swap steamapp.dll for origindrm.dll (or whatever the relevant libraries are) and expect the program to work still.
The games could even be available in different versions between the two different platforms, so even just copy pasting the bulk of the game (levels, music, etc.) might be in vain.
In short, no, it's not possible.
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Best Answer
It is not possible to convert a retail copy of company of heroes to a steam copy. Steam has a list of the games where this is possible, this is mostly valve games.
I had this question myself a year back or so, and I ended up purchasing all the games once again on steam.