I just bought Killzone 3 and 2 Sharp Shooters. I thought I could play co-op with 2 of them or online multi-player. I still haven't figured it out. Anyone else? And also is there a point for me to keep both of them or should I return one? If there's going to be games in the near future that you know of in which you can use 2 Sharp shooters do let me know. So I might as well keep both of them.
As far as I know, split-screen co-op on Killzone 3 is only possible with two dualshocks. Split-screen co-op with move hasn't been implemented and who knows if it is going to be. As for future games that might support 2 sharp shooters I haven't heard of any.
RE5 gold edition uses move & navigation support for 2 players unfortunately it doesn't use the trigger alone to fire so the sharpshooter is useless with that game. Weird set up for sure but at least it is the only shooting game not on rails that does use the move and navigation controls in splitscreen.