For the longest time, I was convinced that 4. was Resident Evil 4, but upon counting the letters (as best I could) it does seem like it is Spider Man 2. Yahtzee had mentioned Resident Evil 4 a few times before, and the box art is red in the PAL regions, similar to the box in the video, but i think "resident" is too long for that first word, and the second word does look a lot like "man". So i regretfully say that this is Yahtzee's top 5 games as far as I can say (and mine).
1. Portal (I agree)
2. Silent Hill 2 (Bioshock)
3. Prince of Persia: SOT (same)
4. Spider Man 2 (Max Payne)
5. Fantasy World Dizzy (probably Call of Duty 4)
I know, I'm mostly a newish gamer, but those seem to be the games that stand out the most to me. I haven't played the Half Life series at all, though, because they aren't out for Mac yet, but those are supposed to be very good.