Battlefleet Gothic: Armada 2 is really good, but it's also kind of a niche thing: Tactical capital ship combat in the 41st century isn't going to be everyone's cup of tea, after all. If you're not sure which side of that particular line you stand on, now you can find out for free.
From today until until 11 am PT/2 pm ET on August 26, Battlefleet Gothic: Armada 2 is free to play on Steam. Just go to the store page, click the "play now" button, and have at it. It's the full version of the game so you can dive as deeply into it as you can manage over a three-day stretch in solo, co-op, or versus multiplayer (although that might not be the best idea ever if you're just getting into it), but the Chaos Campaign expansion released in June is not included.
Battlefleet Gothic: Armada 2 is also on sale for 40 percent off during the free weekend, dropping it to $24/£21/€24. The Chaos Campaign expansion is also on sale, for $11/£10/€11.