Rising Storm 2: Vietnam is free to play on Steam until 20:00 BST / 15:00 ET / 12:00 PT tonight. There's also double XP until September 5, 2017.
Take aim with our list of the best PC shooters.
Jump in today and you'll get to sample Rising Storm 2: Vietnam for free, although be warned - this is one of the toughest shooters out there. Sprayin' and prayin' won't work in these scenarios.
If you like what you see, you can pick up the game for a 25% discount, and keep your progress, too.
At yesterday's Tripwire PAX West , Antimatter Games revealed the next Rising Storm 2: Vietnam update will feature our friends from Down Under. The ANZAC update (working title) - named after the Australian and New Zealand Army Corps coming to the game - not only brings the new faction, but also two new maps, a new helicopter, Bushranger, and a heap of new weapons, too.