I played all the previous Dead Horizon games, and all of them are interesting in their own way.
I also just finished watching the first episode of Trigun 90's anime, and I see that Redstar has a similar design to Vash as well Trigun's influence just from the Revolver Bonnie and he used
Dead Horizon
I think it's your first Dead Horizon game? but anyway, it was very far from the current Dead Horizon and Origin in terms of aesthetics, the OST and complaints from the guy give me the vibe I'm playing a horror game and a sense of hopelessness. unfortunately, I didn't reach the end due to me being not good at roguelike (and not that big of a fan of it) but it does serve much ground for future Dead Horizon.
Dead Horizon: Origin
This is when we play as our beloved gunslinger Bonnie Star! we see her humble beginning shooting cans as she is being taught by the old man and how she started to become a wreck in the next installment, the ost is amazing, and for a short game free game, it was an amazing experience to play, and I remember a bit struggling when dealing with Fred but it's not an issue, and it's nice to see some OST from this game get into newer Dead Horizon.
also, is it just me that Bonnie looks chubbier in Origin compared to her current look?
My conclusion.
Looking at those two games, I felt like this game will get darker as the story progress, everything that looks colorful and cheerful at the start will in the future become darker and tragic as Bonnie goes on her journey in the dying world as an outlaw carrying the bible. and well the Sci-fi aspect of the game that I can't wait to see as this game got finished!
on an unrelated question, I saw a trailer for Yolk Hero on your YT channel, and I'm curious about the game as the premise itself looked interesting, I cannot say much about it, but I would love to play and pay for it when it fully comes out!