Valve is giving those who've never played Team Fortress 2 the chance to try out the PC version for free this weekend.
As of today, you'll be able to pre-load the game via the Steam store. Then you've got until Tuesday to give it a go.
It's all to celebrate the release of the new Spy vs. Sniper update, which is also due out today. Visit TeamFortress.com for the full lowdown.