Far Cry with HL2 just behind... won't bother mentioning Doom 3.
HL2 is without argument an extremely creative game, built on an incredible engine, but though the story was long and complex, It didn't draw me into the Half Life world. I didn't feel like I was actually there. A lot of the graphics are impressive and the sounds are just amazing (I especially enjoyed the feeling of pursuit with the Combine radio chatter echoing through urban alleys and hallways). The overall graphics render was quite a let-down for me though. While most of the environment was well created, the lighting and gray shade to everything made everything (including the characters models) seem fake, almost like claymation. Also the guns were pathetic, with little variety (I'm not talking about the "Super AT-4", grav gun, and crowbar, which were endless fun).
Far Cry had plenty of shortcomings also, but it was the first time I was drawn in and immersed the gaming experience and realism since the addicting Soldier of Fortune 2 multiplayer world (quite a while ago). I havent played any other game with such realistic weapons and environments, not to mention that Far Cry's tunnels and labs can only be surpassed in quality by the complex Doom3 lighting system (the only reason i will ever play D3 again). I've never had so much fun creeping through the jungles and merc compounds and the 1000+ meter visual distance (these qualities only get better with the 64 bit version) makes scout sniping from hide sites just incredible, creeping through the underbrush and as you peer through the foliage, your sniper barrell is laced with a dynamic shadow from each blade of grass... it's just a final touch that gives you a "woa... " inside.
So if you can get over the cartoon style voice acting and cliches, I think Far Cry is definately capable of producing the superior emotionally driven experience. Something like that first time you went to the big screen for Fellowship of the Ring...
BTW, the fear and dread of those mysterious Trigens that twists your jungle adventure into a nightmare rivals the suspense in Doom3 and Half Life 2 whose strongest point seems to be "fear of zombies". In any case, it's quite necessary to run these games on the best rig you can afford, if you want an epic experience.:wine: