When I try to add Bionic Commando: Rearmed (purchased via GamersGate) to Steam, I get the following error message:
No such interface supported
What the heck does that mean? And is there a workaround?
This may or may not be relevant, but the Gamersgate installer installed the game to the 'windows games' directory, which seems to behave differently from the rest of the system.
This is what I see when I view the shortcut properties:
Here is a very informative chat conversation that should give you lots of more information about this that I can't be bothered to accurately record here.