Half-Life 2 mod Minerva - the project that landed Adam Foster a job at Valve - will be added to Steam later today, and will be free.
It came out a million years ago in 2007, but has been tidied up for its big day on Steam. Bugs have been fixed, visuals tweaked, puzzles improved and a feather duster applied with vigour to various other nooks and crannies along the way.
Minerva captured plenty of attention back in the day for being a rare high-quality - "arguably Valve-quality", wrote Foster in an email to Eurogamer - storied single-player mod for Half-Life 2. It requires Half-Life 2: Episode One to play, but once you have that, there's nothing to pay.
The name Minerva refers to the mod's mysterious narrator, unseen, who guides and pokes fun at you as you explore a strange underground Combine facility. Something to bide the time while you wait for, oh I don't know, Half-Life 3.
The mod will be released on Steam late morning west coast time (PDT). That's eight hours behind the UK, so you're looking at late afternoon or evening if you live here.