Randomizers are a term applied to external modifiers to a video game that well, randomize stuff. They are mostly applied to 'old' games, most notably Super Metroid, the Legend of Zelda Link to the Past, and the most popular one seems to be Zelda Ocarina Of Time Randomizer. If you played and enjoyed any of these games in the past I suggest giving these randomizers a go. There's even one for Metroid Prime. There's also some for many Pokemon games, but uhhh I'd avoid those unless you don't like your sanity. I can't provide a full guide on how to set up a Randomizer (it's different for each game) but it'll take like, a youtube video or two to figure it out. Hell, the fact that *I* can do it, in spite of my incompetence you guys could probably manage. I would advise to tread cautiously though, since it's you know, random, the seed (instance of randomization) you can get can lead you to a 30 minute victory or a three day hell hole of figuring out what to do. Thankfully most randomizers have an option to create a spoiler log (a detailed list of where each item is located) so you aren't absolutely stuck. I'd recommend giving the Ocarina of Time Randomizer a go first. Simply because Ocarina of Time doesn't have as many potential soft locks (instances where you can get 'stuck' in the game in some inescapable way) compared to the others I listed. OoT is also the easiest game to beat. the only kind of sketchy thing with randomizers is obtaining the rom files for the game in question.
I'm designing an Alien vs Predator game that utilizes random spawn points in the levels, so you never know which vents the xenomorphs are going to come out of. Every room you go into could have an alien crawling out of a vent and charging you. In the vent level, they enter at random points as well, so you never know where they'll be. I knew I couldn't make a game that looked as good as Alien: Isolation, but I could certainly make one a lot more scary to play than Isolation by refraining from scripted scenarios and randomizing the encounters.
That's pretty cool. If I ever get around to making something like a metroidvania I'll probably try to add an item randomiser. Or you know hire someone to do it.
It depends on my mood, I'm not joking, I literally have to be in a particular mindset to enjoy playing a game genre. I'm playing Great Ace Attorney right now (I can't recommend Ace Attorney enough if you like mysteries, even just watching it is entertaining). I enjoy warriors games in short bursts (they're pretty great played that way.) Though these are hard to get into sometimes, they are a power trip though. I mostly stick to RPG's and the like because I play games for story heh. I enjoy the 2D games on occasion, especially sprite based ones with actually good sprite work. Cross Code is a game I'd reccomend grabbing if you ever see it on sale, bit of forewarning though, the puzzles are murder lol