As the introduction suggests, re3-vita is a port of the open-source re3 engine for the PlayStation Vita which allows one to play Grand Theft Auto III natively. With Rinnegatamante & TheFlow being behind the port, it was received quite positively within the PSVita community as it finally granted the console a 3D GTA game that ran pretty well compared to the PSP’s GTA games which ran into evident performance issues especially when using TheFlow’s Native Resolution Patch.

PSVita: re3-vita 1.1 released with 40% better performance, freecam feature and various fixes - You can now enjoy GTA III without ever worrying about performance! - Wololo.net