Don't Bite Me Bro! has 7 ultra rares, I 100%ed in 6 hours. (It's a free game btw ) The game isn't hard it's just extremely glitchy and crashes easily, you will want to follow a guide that specifically does things in a way that avoids the game breaking glitches. Stranded Deep 9 ultra rares, took me a couple days of continuous play to 100%. It's only tough at first while your learning how to survive correctly without getting diarrhea, but after you get the swing of it, expect a snowball of monotony. Now 2 of the trophies are actually pretty difficult (bosses and putting animals on your raft), but the others are pretty much effortless. Just requires some time invested watching the in game timer pass with a small amount of maintenance and some exploring. Extreme Exorcism 10 ultras, personal 100% time 12 hours. It's one of those games that made ps plus, got played by tens of thousands of people that had no interest in completing it and was later forgotten. 2 trophies are actually challenging (complete all challenges and kill final boss with out losing a life), 1 other is an obnoxious why is this here grind (1,000 deaths), the remaining 7 can be grabbed at will with MINOR effort. Dead Cells 6 to grab here, took me a day and some change to 100%, it's a rogue-like, oh but those are tough right? Nah this one lets you use save states, you can save scum your way to victory if need be. Personally didn't have to save more than once per level change or a few times during bosses while using cursed sword. But the option is there for you to really abuse it if you have to.
LocoRoco Remastered 11 ultra rares, 5 days of casual I hate this game trudging for my 100%, could probably do it in 1-2 if you're motivated and in good mental health lmao. So it's definitely not hard, but it's long, slow, and grindy in ways that are subliminal. 40 levels, each level must be played twice, once for collectibles, once for speed run. You'll be investing 10-15 minutes or so in each level and that's if you don't miss anything or get screwed on a bad hop near something dangerous (Never look away unless you've paused they start doing little hops on their own after a few seconds). But to be clear, it is NOT a hard game, just a frustratingly long and slow one. I recommend muting the god awful music, I started having nightmares after day 2.