Not only is this the best value gaming collection to date, it's also a helluva lot of fun too!
Lets start at the beginning-
Half Life 2. Coming in as an outsider, I came into the series not knowing what to expect, but as the lengthly, fun and immersive story, innovative gameplay and puzzle elements come to light the true greatness of the game shines too. Individual Score- 9.0
Half Life 2: Episode One. Fresh after beating the first HL2 bit i jumped into the next, hungry for more of what I had experienced and to find out the next developments in the story. What I came out with was a good, but somewhat bland continuation. Though it delves straight where HL2 left off, it feels disjointed, and before you can really get into the fun of the gameplay and story you find it's over, only giving you a bite f what you feel it has to offer. Individual Score- 8.6
Half Life 2:Episode 2. Hearing good things I only expected better of the next episode, and it turned out to be true. Episode 2 brings out the best of HL2's gameplay,story and puzzle elements while still managing to give the series a breath of fresh air with new level designs and concepts. Individual Score- 9.0
Portal. This is a gem. The gameplay is so new, so original it rivals Tetris, and its humor is enough to shake your head and chuckle. Adds just enough new elements to the table to be able to wow you after each and every level. Individual Score- 9.0
TF2. The Reviewer is unable to review this game at this point tin time. Theoretical Score- 8.9
In the end you, the consumer, whether a VALVE newcomer or veteran will find something you like in this little package.