I realized that I have completed very few games in my life. These are the only ones I’ve completed from start to end:
Half-Life
Half-Life: Opposing Force
Half-Life: Blue Shift
Half-Life 2
Half-Life 2: Episode One
Half-Life 2: Episode Two
Portal
Elastomania
Far Cry
Tomb Raider Legend
Quake 3 Arena (does it even count?)
Have anyone completed fewer games than that? How long is your list?
oh, my god i’m so sorry
HL2: Ep2
Portal
L4D2 if it even counts…
Sven Co-op if it even counts… 
Some modern-military-shooter games (BF3)
Fuck singleplayer games. And yes, not even HL1.
I am very, very sorry for you. Really. 
Wow, do people really not play that many games? My list would be pretty long and I don’t even remember all the games I’ve finished, but it’s probably well over 50 at least.
wh
what
Simply perfect.
Didn’t you run Condition Zero?
I own 122 games on steam alone. I’ve completed:
Doom (with Brutal Doom mod)
Half Life
Half Life: Opposing Force
Half Life: Blue Shift
Half Life 2
Half Life 2: Episode 1
Half Life 2: Episode 2
Dear Esther (lol)
Portal
Portal 2
Quake 3 Arena
Braid
To be fair, you can’t really “complete” a lot of games. Like Civilisation, Team Fortress, etc. I have over 100 hours on Ricochet, so I’ve certainly got my money’s worth even if I never ‘finished’ it.
This made me curious how many games I actually finished. Turns out that it is less than i expected. Here a list i made:
Steam Games: 63
Games I have never played: 10 (Humble Bundles…)
Games I played from beginning to end: 15
Games I did not complete: 20
Games I ‘finished’ but don’t have a real end: 9
Games I ‘not finished’ but don’t have a real end: 9
I decided to go through my Steam games and see what I’ve completed:
Halo 1 and 2 would be the only non-Steam games I’ve completed.
I guess the list is a bit bigger than yours, bit still not huge. Also note I’ve also never completed Half-Life, the first time I played I could never figure out Nihilanth and every other play through I never got that far - I love the earlier chapters so much more.
Erm… Guys, have you seriously never owned a console? Nintendo 64, NES, SNES, PlayStation, fucking Xbox? No console games completed back in the day? Or are we only counting PC games?
I’m not even gonna participate in making a list, it would seriously take me hours.
Not gonna remember every PC game I completed. Apart from that, I have a PS1. Love that thing! Some of the games I competed on it are:
Spyro 1, 2, 3 - a lot of times, including 100% for each (that would be 120%, 100% and 117% IIRC)
Crash Bandicoot 1, 2, 3, 4, 5 - 1, 2 and 3 a lot of times, including 100%s (100%, 100%, 105%)
Other games I don’t remember.
I have completed some games on my GBA, as well as on my PSP, don’t remember the titles already. Great times.
It’s not the completed game count that defines you as a good or bad gamer. It’s just stupid to grade yourself like that.
I’ve noticed that I have a hard time playing other games - whenever I try something new, I go back to Half-Life. I’m not sure what’s the reason behind this.
To anyone interested, here’s the list of all games (that I remember) I’ve completed
[ul][li]Jazz Jackrabbit[/li]
[li]Jazz Jackrabbit 2[/li]
[li]Triplane Turmoil (all campaigns)[/li]
[li]Ignition[/li]
[li]Re-Volt[/li]
[li]Maniac Mansion Deluxe[/li]
[li]5 Days A Stranger[/li]
[li]6 Days A Sacrifice[/li]
[li]7 Days A Skeptic[/li]
[li]Trilby’s Notes[/li][/ul]
Modern games:
[ul][li]Lego Racers 2[/li]
[li]Fatal Frame[/li]
[li]Grand Theft Auto 3[/li]
[li]Grand Theft Auto: San Andreas[/li]
[li]Half-Life series[/li]
[li]Portal series[/li]
[li]Mirror’s Edge[/li]
[li]Super Meat Boy[/li]
[li]Tomb Raider: Anniversary[/li]
[li]Worms Reloaded (I think)[/li][/ul]
These are all I remember for now, might be 1 or 2 more games that I’ve completed, but they are hiding deep inside my memory.
The list is huge in my opinion, but there’s no way I’m counting myself as a good gamer.
Not a single one. 
NES/Famicom games completed
Abadox
Adventures of Tom Sawyer
Amagon
Atlantis no Nazo
Batman
Batman - Return of the Joker
Battle of Olympus
Battletoads
Bio Force Ape
Bio Miracle Bokutte Upa
Bionic Commando
Blaster Master
Bubble Bobble
Bucky O'Hare
Castlevania
Castlevania II - Simon's Quest
Castlevania III - Dracula's Curse
Cattou Ninden Teyandee
Cheetahmen
Cheetahmen II
Chip 'n Dale Rescue Rangers
Chip 'n Dale Rescue Rangers 2
Cobra Triangle
Commando
Contra
Cowboy Kid
Crystalis
Darkwing Duck
Deadly Towers
Die Hard
Don Doko Don 2
Donald Land
Donkey Kong
Donkey Kong Country 4
Duck Tales
Duck Tales 2
Erunaaku no Zaihou
Flintstones - The Rescue of Dino & Hoppy
Flintstones 2 - The Surprise at Dinosaur Peak
Ganso Saiyuuki - Super Monkey Daibouken
Garfield - A Week of Garfield
Gauntlet
Gimmick!
Gradius
Guardian Legend
Gun.Smoke
Hammerin' Harry
Hi No Tori - Houou Hen - Gaou no Bouken
Hi-Game 1999 - Super Donkey Kong 2
Hudson's Adventure Island
Hudson's Adventure Island II
Ice Climber
Ikari Warriors (with cheat)
Ikari Warriors 2 - Victory Road
Ironsword - Wizards & Warriors 2
Jackie Chan's Action Kung Fu
Jetsons - Cogswell's Caper!
Joe & Mac
Journey to Silius
Jumpin' Kid - Jack to Mame no Ki Monogatari
Kickle Cubicle
Krion Conquest, The
Legend of Zelda, The
Legend of Zelda 2, Adventure of Link
Life Force
Little Nemo - The Dream Master
Little Samson
Marble Madness
Mega Man
Mega Man 2
Mega Man 3
Mega Man 4
Mega Man 5
Mega Man 6
Metal Mech - Man & Machine
Metal Storm
Metroid
Mike Tyson's Punch Out!!
Miracle Ropit's Adventure in 2100
Mitsume ga Tooru
Monster in My Pocket
Monster Party
Moon Crystal
Ninja Crusaders
Ninja Gaiden
Ninja Gaiden 2 - The Dark Sword of Chaos
Ninja Gaiden 3 - The Ancient Ship of Doom
Power Blade
Puss n Boots - Pero's Great Adventure
River City Ransom
Rockin' Kats
Rocman X
Rush'n Attack
Rygar
Shatterhand
Snow Bros
Spy vs. Spy
Star Tropics
Star Tropics 2, Zoda's Revenge
Street Fighter 2010
Strider
Solstice - The Quest for the Staff of Demnos
Super C
Super Donkey Kong
Super Mario Bros.
Super Mario Bros. 2 (US)
Super Mario Bros. 3
Sword Master
Tiny Toon Adventures
Ufouria
Whomp'Em
Vice - Project Doom
Wizards & Warriors
Wizards & Warriors 3
Wrath of the Black Manta
Xexyz
I don’t really care about making a list for PC and other consoles since they don’t interest me as much :
My parents never wanted to buy me a console when i was a child, and when I had a decent computer, I didn’t want one any more. I still remember my father saying to my mother when i was 7: “Buy him LEGO’s, he will play with them far longer than with a GameBoy”. I’m still laughing…
I’ve owned a Sega and a PS1, never really spent much time playing either. I don’t really like consoles. I did also have a Nintendo DS and I completed Mario Cart, if that counts.
I’m probably the worst.
No HL or anything, because i don’t know. I stopped somewhere @ Xen start.
Bioshock Infinite
Portal
Dear Esther
That’s all?
Must say I’m glad I got LEGO instead : > Though I inherited a Sega Master System from my brother. But I never finished a game on it.
Yet four maps to finish.
Alien Swarm
Banjo-Kazooie
Borderlands
Carmageddon 2
Carmageddon TDR2000
Dear Esther
Defense Grid: The Awakening
Deus Ex
Deus Ex: Human Revolution
Fahrenheit
Fallout 3
Far Cry 2
Flatout 2
Grand Theft Auto III
Grand Theft Auto IV
Grand Theft Auto: San Andreas
Grand Theft Auto: Vice City
Grim Fandango
Guitar Hero 3
Guitar Hero World Tour
Half-Life
Half-Life 2
Half-Life 2: Episode One
Half-Life 2: Episode Two
Half-Life: Opposing Force
Insaniquarium
Lara Croft and the Guardian of Light
Left 4 Dead 2
Magicka
Mirror’s Edge
Need for Speed: Carbon
Need for Speed: Underground
Need for Speed: Underground 2
Octodad
Peggle
Peggle Nights
Plants vs. Zombies
Portal
Portal 2
Red Alert 2
S.C.A.R.S.
Serious Sam 2
Split/Second
Spore
Surgeon Simulator 2013
SWAT 4
Tank Racer
Tomb Raider: Legend
Unreal II: The Awakening
Unreal Tournament 2004
World of Goo
Worms 3D
Prolly forgot some obscure games still.