Topic on Talk:The big list of third-party DRM on Steam
I checked the Bring Down the Sky installer and it looks like the list entry is correct. The DLC installer applies the regular Patch 1.02 installer which has SecuROM 7 DRM on MassEffect.exe
(according to PROTECTiON iD).
I don't have the Steam version of this game to test whether the patch installer successfully replaces Steam's normal executable with this SecuROM one; either way it should be possible to install the DLC, delete MassEffect.exe
and then verify the cache to restore Steam's version of MassEffect.exe
.