What are the top 5 console games that defined last generation for you? Not the best games - but the ones you felt had the most influence, an influence you can even see today.
5. Geometry Wars: Retro Evolved - a random choice, but really proved the idea of indie gaming on consoles. This would pave the way for indie domination later in the generation. I remember this being my most played 360 game when I first got the 360. I was thinking of putting Braid on here but I think Geometry Wars was first and more influential.
4. The Elder Scrolls IV: Oblivion - WRPGs were on consoles before (Morrowind, KOTOR, Fable) but this "next generation" RPG which released very early in the Xbox 360 life cycle completely changed the game. Huge open world, great graphics, and it's one of the reasons WRPGs eclipsed JRPGs the last generation.
3. Gears of War - it didn't invent the cover mechanic, but it sure popularized it. Every game had it - from Metal Gear Solid to GTA, from Killzone to Uncharted. It made Unreal Engine 3 a super popular engine for last generation. Also it was the Halo for the Xbox 360 - the reason you had to buy a 360.
2. Call of Duty 4: Modern Warfare - Added so much to multiplayer gaming. Basically copied from every FPS from then on - including Halo. The series was getting so popular it was ridiculous. FPS were the most popular genre last generation and Call of Duty led the way.
1. Wii Sports - The most popular console game of all time. Opened gaming to the mainstream. Was all over the world when it came out. To call it a phenomenon would be selling it short. Sony and Microsoft attempted to copy it with the Move and Kinect, respectively. In fact, Microsoft changed the strategy for the Xbox 360 half-way during the generation because of it (going from a hardcore gaming machine to a Kinect machine pretty much). It got older people, women, little kids, to play more games. To prove it wasn't just a fad, Wii Sports Resort sold over 33 million. Wow.
Honorable mentions: Demon's Souls, Grand Theft Auto IV, Uncharted 2, Braid, Street Fighter IV, Wii Fit, Super Mario Galaxy