From Software’s first-person roots
From Software doesn’t just make Demon’s/Dark Souls and Bloodborne. The company created Armored Core, too. It also followed its King’s Field games with another first-person, skeletal RPG, Shadow Tower.
Shadow Tower has been rated by the ESRB for PSP, PS Vita, and PS3, as spotted by DualShockers, which could point to an impending PSN release, possibly ahead of Bloodborne.
And, if not, Shadow Tower has been on the Japanese PlayStation Store since 2007. You can always break out that alternate account.