I played Chasm: The Rift. Pretty overrated, honestly. People are probably just inclined to pretend it's good because it's impressive from a technical standpoint for its time, but that doesn't mean it's fun. It'd only be alright if it were 1997 and your computer wasn't good enough to run Quake.
70% of the game is either peeking in and out of a corner to shoot and then repeating that a few times, or standing still and waiting for an enemy to die while you stunlock them with your shotgun. The hitscan enemies instantly shoot you and take all your health away if you're outside of cover for more than half a second, projectiles aren't any different because most of them home into you, and the melee enemies are just insane bullet sponges. There's a boar enemy that legit takes over 3 dozen shotgun shots to kill (you can't use anything else on them because ammo is too scarce) and I had to get on my phone out of boredom whenever there was one.
15% of it is when you're forced to walk into another cheap "dump half a dozen monsters behind you in a closed space" trap that you would never be able to see coming unless you've already been fucked over by it. I'm pretty sure this accounts for almost every single death of anybody's playthrough. One of the traps is a tiny room with an item in it that you need to pick up, and once you do it spawns a dozen of the biggest melee enemies in the game and locks the door that you came from. It's just bullshit. Even more so because of how collision works in the game. You pretty much get glued to monsters if you touch one and you can only get free by killing them. That's not really fun when most of every level is a tight labyrinth.
The rest 5% are the boss battles that are at least unique, but not anything else. It's just dying over and over until you figure out the dumb trick for each one. One of them is a gay wordplay puzzle that inevitably has you looking up what to do, and another needs you to accidentally find a hidden crack in the wall that you can go through.
The maps are your typical 90s FPS levels where you spend more time running around trying to figure out where you're supposed to go than time spent actually playing. Which is usually just because of me being retarded but not here. People blabber on about the "atmosphere" but I didn't care for it.
The weapons are mostly samey and just has you using whatever you have any ammo left for because they didn't put enough to compensate for bullet sponge enemies. I had to use the starter shotgun more than any other weapon because it's the only gun with infinite ammo. The rocket launcher is fucking cancer and scares you to use because hitboxes in 2.5D aren't the best, so you'll constantly blow yourself up firing at geometry that isn't visible but is a part of a wall. Or just because the levels are so closed in. The BFG equivalent can't even one shot the weakest enemy in the game while giving you a seizure, so that says enough. The one cool thing is a mine layer that lets you have a bit of fun by guessing where the game is going to randomly spawn enemies to instantly rape you and placing the mines there.
Most of the tedium is probably because I played on hard, but you don't really have a choice when normal is piss easy and so even more boring.
It does have one semi-cool thing, you can shoot body parts off enemies and that sometimes even changes their attack type. It'd be cool if it wasn't so inconsistent that it's just a vanity feature.
Honestly, they probably did the best they could given the budget, but it's still shit.