Which was the most value saved game that you lost?

Crusader Kings II ironman with one of the vikings tribe, when i owned half of the world and still had 2/3 of the time to play. My world conquest and decent number of hours was brutally wasted by a corrupted save file :/

Football Manager 2010, for the reason that I'd put a lot of time into it. Hard to know exactly how many hours I lost, as I used to run that game 24/7, minimizing the window when I wasn't actually playing. As a result I have 10,00 hours registered on Steam. Actual gameplay hours is probably 1000-2000, which is admittedly still a lot. For the save I lost it was 100+ as a guess.

FM 2012.

23 seasons. 3 different teams. 1 national team. (non of the teams were strong.)

won: 1 world cup, 18-19 championship. a lot of euro ch. several promotions.

reason: file corruption.

PS2 saves for several RPGs including 100 hours on Final Fantasy X.

Pokemon Diamond; I gave it to my sister to hold and she let some stranger "look" at it, and that person stole it.

The original Baseball Stars for the NES.

I had once bumped the system while playing the game and everything on screen went wonky. When I started the game back up all of my saved teams had infinite amounts of money in their coffers. My teams needless to say, became quite dominant.

One day my brother went to create a new team and inadvertently deleted all of mine. Sad day, a sad day indeed.

Fallout 3.
I had thousands of hours accumulated over multiple playthroughs, but my main file was 500+ hours.

Lost it when my sister's toddler managed to RROD my 360 Elite.. :c

150hours+ at final fantasy VII,i got a 'file is corrupted' for those that know the pain back in psx.after that i always saved at 2 blocks.

When I was very young, my cousin accidentally wiped my Ratchet & Clank save. This save was like the Master Save. There were other save slots that people could use or overwrite, but only I was allowed to touch the Master Save. I had unlocked everything, collected everything, had a shit-ton of playthroughs on it. Keep in mind I was very young, so this was a massive achievement for me. I was not happy when I found out she had wiped it.

Also, I recently just found out that my Pokemon Gold save is now corrupted or something. Pokemon Gold was my first ever game. I've had that save for like, 13-14 years.

Fallout 3.

Baldur's Gate 2. I was on the last chapter, doing and exploring everything. Probably 200-300 hours of gameplay. I've never had the motivation to start over again :(

Grand Theft Auto: San Andreas for the PlayStation 2.

Nearly at the end of the game, when you're back again at Los Santos, my brother accidentally overwrote his save into mine ;_;

So I had to do it back from scratch but thanks to that I could finally finish the damn game :V

lost my pokemon silver save some times ago. that was like my fav. i got it on the release day. went on store, and it wasn't available yet. the dude called back when the truck was coming and i got it out of the fresh boxes. was so damn shiny on the counter

i also somehow lost my pokemon blue save when i was like 6 or 7. i cried because i liked my pokemons and spent a lot of time on it. that very first time your game tells you "New game" or "Quit" only. oh god, that feel

Last Remnant and Icewind Dale where i had both over 20 hours gameplay in.

Planescape: Torment. Corrupt savefile due to some bug in the old, unpatched version of the game.

Need for Speed Underground 2. I lost my save after almost finishing it. Twice.

i lost a pokemon save file on Silver with all pokemons caught when i was a kid, i think i cried for the rest of the day

When i was young my brother erased my save on Zelda: Ocarina of Time :/
It still get brought up once in a while when we meet ^^

Warband... I had a nice army, with 150+ soldiers, some castles... And bang, it bugged, I had 0 troops and my game kept crashing.

Xbox 360 -> Assassins Creed 2 -> To about to get the last feather (and the last two achievements) -> I changed the audio to Italian just to test it and BLAM, savegame got pwned. :(

400 hours on final fantasy X almost has all weapons, armors and Aeon but deleted by accident .___.

cookie clicker, i played for weeks, had billion cookies per second, nearly all achievement...
the problem is, this game save files is stored in your browser cookies(no pun intended). I got to reinstall my windows, and forgot to back up it first

Fallout 3 on my Ps3: saved in the last room of the game and I didn't have any other game saves (I'm not buying the DLC just for that).
San Andreas on my Ps2: I don't know how the save got deleted.

Playstation 2 Kingdom Hearts 1... I lost about 60 hours of gameplay... (I was taking my time with it)