Bully, Manhunt and XCOM Vita all stealth released on the same day. Kinda seems like someone at 2K fucked up the release date when they submitted them to SCEE. That or SCEE fucked up, which is actually probably the most likely scenario.
The problem is that we only learned the existence of this game is via ESRB log files and it's trophy list.
I don't recall it being advertised in any way