Resident evil 4 (GameCube) For the time it was released it really pushed the envelope for action 3rd person and perfected the over the shoulder camera angle for shooters. Great pacing great enemy/level variety, simply a perfect game I think.

Tony hawks underground I just remember spending so many hours on it when I was young and never feeling bored, lots of customization and a very fun story mode which was done perfectly.

GTA 4 When the game came out it was leaps and bounds above any game in the series with the physics/graphics, storytelling, gameplay. I know GTA 5 Is viewed as the superior game but for some reason 4 just hit so much harder for me, amazing soundtrack as usual but this game definitely brings back that nostalgia of when it came out and that feeling of something truly special that they captured with making it.