2. Mass Effect - Xbox 360.
What to say about Mass Effect? It's the RPG every Blade Runner fan has been waiting for. Developer BioWare has in one fell swoop made its previous, also excellent, RPG effort Star Wars: Knights of the Old Republic extinct. Mass Effect looks like an 80's sci-fi movie, it sounds like an 80's sci-fi movie and it feels like you've been transported into an 80's sci-fi movie. Don't get me wrong, it has its flaws, but these are so overwhelming outweighed by its positives that you'll hardly notice. If you have a big HD TV and surround sound, you owe it to yourself to play Mass Effect.
1. World of Warcraft - PC.
It's amazing to think that nearly three years after it was released, World of Warcraft's popularity still shows no sign of slowing down. What is it, 9.3 million players globally now? Amazing. I still remember the first day I played WoW. The weekend it came out, I rushed to my local GAME during my lunch hour, bought it, got home, then played it for 48 hours without stopping. I ate left over pizza, tins of beans and went to the toilet only when I was flying from city to city on the back of a griffin on autopilot. It was one of the greatest weekends of my life. And if you still haven't experienced the phenomenon that is WoW, I heartily recommend you give in and have one of those weekends for yourself.
For a complete run-down of all our Top 10s in this series head over to our handy index page.