Time Crisis Razing Storm is the best light gun game you can get on PS3. It's best played with the Move controller rather than the shitty Guncon. Other than that, there's very little else in terms of light gun games on the PS3. Hope that helps.
I've not heard much about these two games since everything changed with Driveclub not being available. It seems that Contrast (replacement to Driveclub) and Resogun have seen more media coverage than the original free titles announced by Sony. Understandable as Resogun is a PS4 exclusive and Contrast is a new release, unlike Outlast and Don't starve which have been on PC for awhile.