A video game backlog is something most avid video game players have. Its essentially just a pile of video games they have in there collection which they have not had the time in their lives yet to play or finish yet. Over the three years I've had my Xbox (I brought after my original laptop had trouble running video games like GTA: San Andreas) for 3 years almost and this is my current backlog of video games I've built up in that time.
Here is a list of mine for the Xbox 360:
-Sonic Adventure
-Space Channel 5 Part 1
-Space Channel 5 Part 2
-TRIALS HD
-Limbo
-Splosion Man
-Scott Pilgrim Vs the World
-Ninety-Nine-Nights
-Soul Calibur V
-Gears of War
-Aliens Vs Predator
-Perfect Dark Zero
-007:Quantum of Solace (Would like to finish the before Skyfall)
-Mass Effect
-Phantasy Star Universe
-Infinite Discovery
-Alan Wake
-Borderlands
-Duke Nukem Forever: The Doctor that Cloned Me
-Saints Row
-Saints Row 2
-Final Fantasy XIII
-Star Ocean: The Last Hope
-Afro Samurai
-Blades X
-Viva Pinata
-Lego Indiana Jones
-Halo Wars
-The Orange Box (Half Life 2, Portal)
-Assassins Creed II
-The Elder Scrolls IV: Oblivion
-Rage
-FIFA 10
-Resident Evil 5
-Dead Rising
-Battle Fantasia
- BlazBlue: Calamity Trigger
-Grand Theft Auto IV
-Grand Theft Auto IV: Stories from Liberty City
-LA Noire
-Red Dead Redemption
That's just ONE console. :P