So on August 13th, 15:00 GMT, the Half-Life community is going to try to beat the all-time record for most players at a single time for Half-Life: Opposing Force. We managed to do it for the Half-Life 1 and 2.
If you don't know what time 15:00 GMT is in your area, just Google it, and it should show you. Oh also, you need to keep the game open for an hour, and it needs to be the regular game, so no mods that are a separate EXE from the base Opposing Force.
Here's Radiation Hazard and noclick's videos that goes a bit more in-depth about it, they're the ones managing these events.
bobomb121
In case you're wondering why we're doing this, it's to show our passion and appreciation towards the Half-Life franchise. I love these games and I look forward to these kind of events lol.