Amazon Germany is running a rather spiffy promotion for preorders of PS4 games (By preordering two titles you get a third for free). The initiative seems to have met some solid success looking at the best sellers chart for video games.

The top ten is almost completely painted blue, besides the third spot held by the PC digital download version of Rainbow Six: Vegas that is free due to another promotion, while the 10th spot is held by the PS3 version of Call of Duty: Ghosts.

Every other spot is held by the eight PS4 games included in the promotion, with Assassin's Creed IV: Black Flag and Killzone: Shadow Fall at the top.

It'd be quite nice if the promotion was extended to other national branches of the retailer, but for now there's no word on that possibility. The initiative for Germany is valid until November the 28th.