Sony has revealed that everyone who buys inFamous in the US will receive a bonus - access to the multiplayer beta test for Uncharted 2.
This is a US-specific promotion, but Sony has told Eurogamer that it's working on something for Europe that will be announced in due course.
Uncharted 2's multiplayer modes - five-on-five competitive matches and three-player co-op - have just been announced by Sony and developer Naughty Dog. You can read more about them in our hands-on preview.
This move echoes one made by Microsoft in 2007. Sony's rival included an invitation to the Halo 3 multiplayer beta with every copy of Realtime Worlds' open-world action game Crackdown. The parallels don't end there - inFamous is also an open-world actioner with a rooftop-hopping, superheroic theme.
Announcing the news at an event last week, Nate Fox, creative director of inFamous developer Sucker Punch, said: "We're so excited. Naughty Dog is like a brother studio to us."
We'll have more on inFamous in the coming days, so stay tuned.