Most played game versus second most played?

Team Fortress 2 - 961.5 hrs on record
Left 4 Dead 2 - 95.2 hrs on record
And third is
Killing Floor - 82.2 hrs on record
:3

Counter-Strike
7.2 hrs last two weeks / 299.6 hrs on record

Dota 2
19.2 hrs last two weeks / 189.8 hrs on record

Anyway, my top nonsteam games are different, as you can see there.

Warcraft III: The Frozen Throne 1559h

Diablo II - Lord of Destruction 976h

Team Fortress 2: 180 hours

Civilization V: 178 hours

Skyrim: 177 hours

Neverwinter Nights 2: 158 hours

I really have no big drops at all.

I don't know my CS:S hours because Valve didn't even record hours until late 2009, would be well over 1000 though, only have 244 on record though. :(

Team Fortress 2: 723 hours.. I feel kind of ashamed about that when looking at TF2 now..

Garry's Mod: 553 hours

Counter-Strike: Source: 296 hours

Left 4 Dead 2: 202 hours

Battlefield Bad Company 2: 196 hours

Counter-Strike: Source 1281.7 hours

Call of Duty: Modern Warfare 2 - Multiplayer 261.5 hours

1435.5 L4D2

157.3 L4D

Dota 6 years

dungeon defender 40 hrs

WoW - i got like 100 days on my main :) + many other chars but i was playing 5-6 years

1742 hours on gmod

365 hours on CS:S

Used to share my account with my brother though.

1 - Spiral Knights - 214.3 h

2 - The Elder Scrolls III: Morrowind - 88.3 h

The Elder Scrolls V: Skyrim - 71.9 hrs on record

The Binding Of Isaac - 53.7 hrs on record

Avadon: The Black Fortress - 41.6 hrs on record

I only stopped piracy (long story) 7-8 months ago, so I think this is pretty OK

The one after that is Sonic Generations, 14 hours by now, but it's going up.

Team Fortress 2 - 1310 - No idling, most of them pre-"let's get retarded" update that introduced the hats.

Super Street Fighter IV: Arcade Edition - 411

Super Meat Boy - 173,4h

Binding of Isaac - 166,4h

Plants vs Zombies - 37,8h

only got a huge drop from 1st to 2nd
TF2 - 179,9h
L4D2 - 104h
The Witcher - 93,6h
Mount & Blade Warband - 70,3h
Battlefield: Bad Company 2 - 64,8h
Rest below 40h

56.5h DC Universe Online

24.5h Half-Life 2

11.6h Trine

TF2 - 170 hours
BC2 - 150 hours

I hate TF2 after the trading update, got almost all of the hours before that.

First --> TF2 - 1071 Hours
Second-->KF - 46 hours(TES V on 43 hours(shall be catching that soon :p))

^^