When I bought my Playstation I couldn't afford a memory card, so I kept Silent Hill on for three-four days. In the end I got stuck and gave up, and I haven't touched the game since. I also had days-long marathon sessions of Ultima 4 when I was about 13.
Some 4 years ago I borrowed my friend's PSX to play Final Fantasy 7 and started playing right after lunch. At the time I did not have a memcard, so I asked my brother if he could buy one for me as he was going shopping. He came back at 7 that evening so I kept playing until he came back. That was say 5-6 hours of continuative play.
A few days ago my young cousin came to see me and wanted to play Radiant Silvergun with a friend. Unfortunately, I did not have a decent save in the cart, so all weapons were pretty weak (if you play it with save startfiles, that is). So when my relative left I decided to boost weapon levels with a few run-throughs of the game. I ended up almost-finishing it three times in a row in Saturn mode and dying at the final countdown so that I could save. If you consider it takes about 1 hour and something for each run-through, that summed up to nearly 4 hours of eye sore with brilliantly coloured special 3D effects, big explosions and flashing lights. Should be made illegal, if you ask me...
And I only reached level 26 with the A weapon... ???
I'm planning on a run-through of Dracula X without saving, since it takes about 15 hours from start to finish, but I'd have to make sure not to die. It's too much of a risk. I'll let everybody know if I ever attempt this.
La Nouvelle Fantasi: Gulliver Boy - 32 hours (finished at level 148)
PC-Engine Emerald Dragon - 16 hours (all subquests complete, beat Zandig at level 132, his fight alone was 30 mins)
Most RPGs I beat are done in one sitting. I find taking long breaks int he middl eo fit disrupts my enjoyment of the story. I used to beat games this way much more requently (FF 1-6, Ys 1-5, Suikoden, Wild Arms, Lufia, Lufia II, etc). I'd get agame on friday and stay awake the next X days till I beat it (and usually sleep the entirity of Sunday). Ahh, I miss those days.
i guess the longest i played a game straight would either be counter-strike lan parties, or when i beat snatcher in one sitting. either way, only somewhere between 8 and 12 hours with stretching/food brakes in the middle, so i dont konw if that even counts.
x-com ufo defense i've had several day stints on. hell i played that game for so long days began to blur. I lost track of what week it was. counterstrike, i've had some 20hr or so sessions with that on a oc48 server where it looked like bout everyone was on a LAN pings were so low. 4day, 65hr FFX venture. several 20hr days on mario rpg. there have been others...
Once, back in '95, I didn't owned a Saturn, and was a Guardian Heroes addict. Me and a friend wnet into the pay-per-play game store, and paid for a 9 hours run. That was the longest play non-stop I ever had.
As for plays with pee\eat stops, My first record was in Phantasy Star IV. It was rented, and I had an urge to beat it. I rented it on Thursday, and gave it back on Monday. I actually beat it on Sunday. Man, I remember how Lassic annoyied me...
Then I broke the record when I rented Nights, during a 5-day holiday. 5 days flying through rings, catching blue chips, and beating up bosses. Those were the days...
My friend and I regularly used to do 12 hour+ sessions on Sega Rally and Daytona USA on the Saturn. The need to beat the other's time by mere 100/sec was too great to think about sleeping. We used to get through gallons of coffee on the way though...
Not technically a sitting, but about six or seven years ago I had Championship Manager 2 on the PC at home (was still at school) and I used to play a few matches before school, get straight on it after school and play until about 4am. That went on for pretty much a year and I can truthfully say that bastard game probably ruined my life. In the end I had to smash the CD so I couldn't play it anymore. Also, during moments of intense frustration, I used to give the monitor a good beating. Which wasn't too bad, but after a year there was a huge hole in the wall where it'd been constantly hit by the monitor. Had to do the cover-up job of the century to stop my mum from seeing it
I set a new record a few weeks ago. Eight straight hours of Final Fantasy X. My previous record was playing FFVII for six straight hours on a Sunday sometime in January of 1998. went from 9:00 AM - 3:00 PM.
Ah - I'm worried now, seeing as how my *average* gaming session lasts about 6 hours (just played SA2B for the last 6), and playing for up to 9 isn't that unusual. My longest ever would be about 12 for Shining Force II the day I got it - am I some sort of freak? (This is a rhetorical question - I know damn well what I am and I'm proud of it)