The seminal Half-Life turns 25 this weekend, and Valve are celebrating with a substantial update which restores launch day content, introduces fresh multiplayer maps, and provides insights into the original development team’s work. As part of the festivities, there’s also an excellent documentary produced by the Noclip production crew.

An instant classic that dared to expand the lore of its predecessor to intriguing depths and flex how physics can be fun in videogames. Virtually flawless game design.

The one that changed the game. The impact of Half-Life is immeasurable, but I’ll always look back and be thankful for that intro train sequence, knowing that all the new games I like learned from it.