Crusader Kings 2.
I just bought the new expansion Monks and Mystics (the 11th expansion) and will probably spend another 100-200h with this game in the next weeks.

Borderlands 2 and Alan Wake.

metal gear solid series

In my case it's World of Goo and Bastion in close second.

Pokemon fire red and soul silver
Gta IV e V
Assassin's creed Ezio trilogy, bloodlines
State of Dacay
Stardew Valley
Mafia II
Sleeping Dogs
Red Dead Redenption
Undertale
Mario 3 and World
Sonic 1, 2 and 3
Kof
The saboteur
Quake 2 and 3
Max Payne 3
Bully
Fable Anniversary

i never play games twice. i'm not that much a gameplay fanatic, but more like a story fanatic. after having played through a game, i'm normally tired of it sinde i look at games like movies. loooong movies.

but there's one game that comes to my mind: price of persia - sands of time

atter my first playthrough i started a second session... immediately. i wss so flashed about the smooth graphics and 3d parvour elements and time-story that i didn't want it to end yet.

a year ago i played bioshock again. but only because i wanted to play part 2 and didn' remeber every story nuance.

Mountain

Roller Coaster Tycoon 2

A bunch of games that i played over and over (I define as beating more than 3 times, or also having played well in excess of what a "Normal" interaction would be), in somewhat random order:

• Streets of Rage 2 & 3
• Phantasy Star 1 & 4
• X-Men (Genesis)
• Rocket Knight Adventures
• Sonic 1 & 2
• Fatal Labyrinth
• Gunstar Heroes
• Eternal Champions (Sega CD version only. NOT Genesis)
• Super Street Fighter 2
• Capcom vs SNK
• Street Fighter Alpha 3
• Marvel vs Capcom 2
• Landstalker
• Shining Force 2
• Castlevania Symphony of the Night
• Super Metroid
• The Binding of Isaac
• Tetris (Gameboy)
• Peggle
• Bust a Move 4
• Saint's Row 2
• Grand Theft Auto San Andreas
• Suikoden 1 & 2
• Shinobi 1 & 3
• Wonder Boy 3 The Dragons Trap
• Spellcaster
• Rambo First Blood Part 2 (Sega Master System)
• Hands of Fate
• Lunar Silver Star and Lunar Eternal Blue (Sega CD, not the remakes)
• Snatcher
• Out of this World / Heart of the Alien
• Mass Effect 1 & 2
• Beyond Good & Evil
• Psychonauts
• Borderlands 1 & 2
• Stardew Valley
• Batman Arkham Asylum/City
• Torchlight 2
• Popful Mail
• Banjo & Kazooie
• Jet Force Gemini
• Perfect Dark
• Panzer Dragoon
• Skies of Arcadia
• Tetris Plus (N64, best Tetris possibly even over original Gameboy)
• Final Fantasy 7
• Burnout 3 Takedown
• Burnout Paradise Island
• Need For Speed 2 Hot Pursuit
• NHL 93/94/95 (Yes, each one individually was played to death, spanning years each)
• FIFA 12
• Joe Montana Talk Football
• Pebble Beach Golf Links (Genesis)
• Hot Shots Golf
• Super Mario Bros (SNES)
• Megaman 1 & 2
• Mega Man X1
• Grandia
• The World Ends With You
• Zelda Windwaker
• Zelda Ocarina of Time

Almost certainly the next one to add to the list: "Zelda: Breath of the Wild"

Suikoden 2 on old PS1, replayed it 6 times :D

On PC I go back to some games but never really replayed any all over again, whereas on PS2
I remember replaying Dark Cloud, SOS The Final Escape, Harvest Moon series. Fahrenheit.

Battlefield 2 modern combat (PS2 and 360) perfect single player experience FPS
Splinter cell chaos theory ! The best of stealth !

I'm guessing we're just talking single player games here, because there are a ton of multiplayer games I come back to all the time to play with friends..

Fallout -series, Jagged Alliance 2, Half-Life -series, Peggle, Tetris.
To a lesser extent some Amiga games (as in I plug the thing in like every 5 years), such as; Pinball Fantasies/Dreams.
Also there are games I used to come back to every once in a while, but haven't in years, such as Doom 1&2, Quake, Carmageddon 1&2, Monkey Island 1&2, Indiana Jones and the Fate of Atlantis.

I'd certainly love to play some old console games I had as a kid, but I always sold those systems to buy the next thing.

3rd Generation Pokemon games stand out, restarted Emerald, Saphire and Ruby several times, where I know some of the playtimes on certain runs went into the hundreds of hours (with the largest being about 400). Others include the old Pokemon Mystery Dungeon games, Borderlands, and Skyrim.

The Elder Scrolls III: Morrowind. I played this many times before I had Steam (played it again once on Steam) and I don't even want to think about what my "hours played" count would look like if I'd had it on Steam the whole time.

MAFIA 1

GTA San Andreas ❤️️

Mass Effect (3)

Plants vs. Zombies. Really

KOTOR II (playing again right now).

Tomb Raider and Batman Arkham Asylum I liked so much I restarted immediately after finishing my first playthrough.

Uncharted 2 & 3
Spec Ops: the Line

Also all Infamous games (but that was for the different endings).

Chrono Cross

Super Mario Land, Metroid II: Return of Samus, Super Metroid, The Legend of Zelda: Link's Awakening, The Legend of Zelda: A Link to the Past, Gargoyle's Quest, Goldeneye, Mario Kart series, Blast Corps, Braid, Peggle Nights, Don't Starve, Plants VS Zombies.

splinter cell series ,max payne series , gta series and cod 4