Most single player steam games are cracked anyway. The real danger of steam is the reliance on it for most multiplayer games. Though if it were to get particularly nasty I imagine adding aftermarket multiplayer functionality would probably be in the realm of possibility. If private WoW servers are a thing, it stands to reason that the same can be done with a lot of other games.
Some games already use P2P, or provide servers for the community to run, so only the private servers would need replicating. Even in that case, I’d argue that having “some” common API, would make it easier than chasing around everyone’s different implementations.
Most single player steam games are cracked anyway. The real danger of steam is the reliance on it for most multiplayer games. Though if it were to get particularly nasty I imagine adding aftermarket multiplayer functionality would probably be in the realm of possibility. If private WoW servers are a thing, it stands to reason that the same can be done with a lot of other games.
Steam supports different multiplayer server modes: Steamworks Multiplayer
Some games already use P2P, or provide servers for the community to run, so only the private servers would need replicating. Even in that case, I’d argue that having “some” common API, would make it easier than chasing around everyone’s different implementations.