This is the best way to play Half-Life now. For new players it's a much more modern experience. And for older players coming back you'll enjoy the updated graphics while still getting most of the magic from the original.
The recently added Xen chapters are some of the most beautiful and well designed maps I've ever played. A thousand times better than the original ones.

Great little story/gameplay mod for Portal 2.
Wonderful voiceacting to tell the story.
Harder puzzles than regular Portal 2 but totally worth it in the end.

Overall a really solid game. Looks great. Combat feels great. Story is not bad. DLC Lord of the Hunt is great. Totally a change of pace as the warchiefs has more than just orcs at their disposal. The reward for finding all collectibles was a bit disappointing and reached 100% after just over 24 hours which feels short for an openworld game.

Best of the 3 Penumbra games. Basicly Amnesia with a few weapons and not as nervewrecking.