Does DOOM count? It's been officially open sourced recently, even though it was already treated as such for decades.Either way, I can't stop playing it, there's 30 years of user created content to go through.
Id Tech 1 (Doom) source has been available since 1997 under a restrictive license and under the GPL since 1999, so not "recently". But yeah, that's my answer. Original Doom.
That's what I'd go with it. Came here to comment it, but I was beaten to it. There are so many great ways to play through it, as the modding community has made so much amazing stuff over the years.
Does DOOM count? It's been officially open sourced recently, even though it was already treated as such for decades.Either way, I can't stop playing it, there's 30 years of user created content to go through.
Id Tech 1 (Doom) source has been available since 1997 under a restrictive license and under the GPL since 1999, so not "recently". But yeah, that's my answer. Original Doom.
That's what I'd go with it. Came here to comment it, but I was beaten to it. There are so many great ways to play through it, as the modding community has made so much amazing stuff over the years.