For its 25th anniversary we added seven multiplayer maps to Half-Life, including four brand new ones: Contamination, Pool Party, Disposal, and Rocket Frenzy. The game's been updated with Steam Networking support, so jumping on a server this weekend is easier than it's ever been.

Half-Life turns 25 this weekend, and we're pushing a big update to bring back some of that 1998 feeling with restored original launch day content, brand new multiplayer maps, a look behind the scenes with the original development team, and more:

The Half-Life 25th Anniversary Update brings back a bunch of long-lost content, including the "Half-Life: Uplink" standalone demo, launch day main menu, and old deathmatch maps created by the original team, plus brand new deathmatch maps made by current Valve level designers.

We got the band back together to celebrate this anniversary, and we invited the fine people at @findsecrettape to film it all happening. Getting together after all this time was the perfect opportunity to revisit the game as it existed in its earliest forms, and to talk about how and why it eventually took shape the way it did. Check out the film to see what it was like to be a part of the team, way back then: or on YouTube at

As part of the 25th Anniversary Update, Half-Life is now Steam Deck Verified! We did a whole Steam Input pass on the game, so it also plays great on your favorite controller. To see the full list of updates Half-Life received today, check the patch notes:

Half-Life: Deathmatch wasn't quite chaotic enough, so we added a bunch of new sprays, plus we dropped in some new multiplayer models: Ivan the Space Biker and early Barney join from Half-Life's pre-alpha days, plus team favorites Skeleton and Too Much Coffee Man. See you online!

Half-Life is free to keep if you get it today, and the rest of the Half-Life franchise is on sale, as part of the 25th anniversary celebration:

Neat! Can we get some Day of Defeat Beta 1.3b or Beta 3.1 to go with that? 🙏 (I have the installers around here somewhere if you need them 😛)

Wow, how about fixing your game? #savetf2 #FixTf2

Are you trying to give the black massa team a heart attack

#FixTF2

THANK. YOU. SO. MUCH! This means so much to half life 1 fans

Wait just a moment.... If the 25th anniversery (idk how to spell but still) of half life gets it updated. Will the 20th anniversery of tf2 get it updated?

VALVE PLS MAKE LEFT 4 DEAD 3 I NEED IT SO MUCHH, PLS MAKE IT WAAA

How 'bout... You #FixTF2