The Darkness looks like it might have but I don't want to make you download it "just in case".
Just in case, what? In case it doesn't support rumble?
I have the retail game here, I'll load it up later and see.... though actually, I guess the demo on the PSN would be less likely to have rumble... they may update the full game, but I doubt they'd do that for the demo?
I have an XBOX360 pad plugged into my PC, and could conduct a similar test that RP2000 is suggesting, but I don't think that any of the PS3 games I have, are on the PC.. most of the rumbling ones are exclusives... hmmm, I'll have to check if Stranglehold has rumble, if so, I could grab the PC demo to compare it to.
From my perspective so far though, using different games, I'd say the XBOX pad has the stronger rumble, though I've also noticed in games on the PS3, there's the option to set the level of rumble, which I've not played around with yet.
Then again, I have the USB XBOX pad, so maybe as it's not a battery powered one, the rumble is stronger? It's certainly loud, in that you can hear the motors working. Made me jump when I loaded up Crysis, and still had the XBOX pad connected. I was playing with keyboard and mouse, loaded a savegame, and jumped off a ledge. The XBOX controller was on the floor, touching my little toe

The bugger vibrated when I landed, on my toe, and made me jump like hell!
V1N.