Rising Storm 2: Vietnam launched in 2017, and it was last updated more than three years ago, in June 2021. Or so it was until yesterday, when developer Tripwire Interactive dropped a surprise update aimed at improving server behavior and security, and fixing a number of VOIP-related bugs.
Updates to Rising Storm 2: Vietnam flowed reasonably regularly until the small 1.6.1 patch in June 2021; after that, it was pretty much dead silence but for a "community game night" in July 2021 and a double XP event for Halloween in 2023.