The "14" might refer to the 14th build of that particular fan project, or it could be part of a filename from an old upload site (e.g., part14.rar ).
The "ISO 14" version is a modded file typically based on the engine of WWE SmackDown vs. Raw 2011 Wwe 12 Ps2 Iso 14
THQ, the publisher at the time, released WWE '12 in November 2011 for the PlayStation 3, Xbox 360, and Wii. The PlayStation 2’s lifecycle was already winding down. The last official WWE game released on the PS2 was WWE SmackDown vs. Raw 2011 in October 2010. The "14" might refer to the 14th build
Because the PS2 hardware was so iconic and easy to mod, dedicated creators have spent years keeping the console alive by "porting" newer games into the old engines. The PlayStation 2’s lifecycle was already winding down
WWE '12 Platform: Sony PlayStation 2 (PS2) Region: NTSC-US (or PAL) Format: ISO (Redump preferred) Size: ~2.3GB (DVD5) Status: Testing / Confirmed working on PCSX2 v1.7+ and real hardware (OPL/ESR)
(the final official PS2 entry) that has been updated by fans to include newer rosters, arenas, and graphics. Review of WWE '12 Mod for PS2