What games are you talking about? I haven't played any games like that ever.
From my backloggery: every game I've beaten:
Final Fantasy I and II - Extra dungeons I've never entered.
Final Fantasy III - I just finished the main story. It's still possible to fight all the summon
creatures I didn't collect on the first playthrough. I think there might be a secret dungeon too.
Final Fantasy IV - Summons to collect. I never entered the land of eidolons. DS version has a superboss in NG+
Final Fantasy V - Superboss, unless you spent lots of time to beating him before beating the game first.
Final Fantasy VII - Chocobo breeding, Ruby and Emerald weapon superbosses, collecting all materia
Final Fantasy VIII - Ultima weapon superboss, collecting all Guardian Forces
Final Fantasy IX - Tons of sidequests, one superboss, all summons that can be collected. One extra dungeon I've never entered.
Final Fantasy X - Superbosses. I never got myself Magus Sister summons either.
Final Fantasy XII - Most sidequests out of all FF games. All the summons must be fought before you can unlock them. The summon battles require precise tactics. There's also a superboss that takes 2-12 hours to beat.
Final Fantasy XIII - Dunno, lots of sidequests, one superboss
For Final Fantasy games, another playthrough may not be necessary for doing everything, but usually people play through the game once, then start a new game and do things with an experts knowledge, all over again.
Dark Souls - Each NG+ increases statistic difficulty percentually, up to the 7th NG+. In NG+7, I think most attacks will kill you in one hit. There's also trophies for discovering all covenants, which I haven't done yet despite playing the game through 4 times, and collecting all special weapons, miracles, pyromancy spells, sorcery spells and rings. You need to find all items if you want to see all item descriptions, which is the only way to discover all of the story the game has to offer.
All Devil May Cry games - completing all secret missions, completing the game on all playthroughs. In DMC4 on PC, if you start from Normal (Devil Hunter), you'll still have to beat Son of Sparda (Hard) and Dante Must Die (Insane). There's also a mode where everything dies in one hit and you in three hits (Heaven or Hell) and a mode that has Son of Sparda difficulty enemies, and you die in three hits (Hell and Hell). A PC exclusive difficulty mode is Legendary Dark Knight, in which enemies are Son of Sparda difficulty, but a huge amount of them spawns for each battle. In one large area I think there were atleast 50 scarecrows.
DMC games are action games, so beating them on all difficulties is a must. Even better, getting S-ranks for them all.
Jedi Academy and Jedi Outcast - They're just pure fun, it's great to do play around with force powers. Jedi Academy has two endings.
Dark Forces 2 - More force powers to play around with, two endings.
Ys I - Achievements, extra difficulty levels. I'd be a babby if I only played through Normal and never touched Hard and Nightmare.
Metal Gear Solid - All difficulty levels, some collectibles. Hard mode removes radar, it makes the game a completely different experience.
Metal Gear Solid 2 - Multiple difficulty levels. AI and scripting technology wonders you won't find in a single playthrough.
Metal Gear Solid 3 - Multiple difficulty levels. Kerotans. Finding all weapons.
Metal Gear Solid 4 - Multiple difficulty levels. Big Boss rank: beat the game on Big Boss Extreme difficulty without causing alerts, killing no enemy, using no healing items, and within a limited time.
Metal Gear Rising: Revengeance - I've beaten Normal, Hard and Very Hard. I still haven't found all secrets. There's still Revengeance difficulty and all VR missions. Also, S-ranking it all.
Godhand - All arena challenges, all difficulties. I've only beaten the game on easy and normal is already really hard.
Persona 3: FES - One superboss and super difficult extra dungeon. Filling Persona compendium 100%. Different dialogue choices change some social events. There's not enough of variables in social events, that's where the game lacks. All social links can't be taken to rank 10 on the first playthrough.
Persona 4 - One superboss, filling persona compendium 100%, all social links can't be taken to rank 10 on the first playthrough.
I haven't beaten SMT: Nocturne yet, but the game has maybe 4 different endings. It also has an optional superboss, an extra dungeon and a demon compendium that can be filled 100%
Demon's Souls: Basically the same as Dark Souls. It's even more difficult to find all stuff in DeS.
NIER - I've gotten all four endings. I've still to finish all sidequests and getting all trophies. NIER is possibly the most difficult game on PS3 to Platinum.
Castlevania: Dracula X Chronicles - Finding all secrets
Crisis Core: Final Fantasy VII - One superboss and all the sidequests required to unlock that superboss battle. Hard difficulty for those who started on Normal.
Dissidia 012: Final Fantasy - One superboss, maxing out all characters for the autistic.
Dissidia: Final Fantasy - Maxing out all characters for the autistic.
Final Fantasy Tactics - Extra characters I didn't find on the first playthrough.
MGS: Peace Walker - no reason to replay
If you buy a game and don't take all out of it, what the heck are you spending the money for?
I remember playing FES haha hate those in dungeon bosses soo much. Alot harder than 3 and 4.
3 was so ridicilous with the boss difficulty.
Every single boss before Nyx was a joke, then Nyx is really difficult.
4 was more balanced with boss difficulty, but it was nothing to write home about.
Nocturne's throwing the American comicbook superhero trope at me: get rekt by a boss, come back later and rekt them after preparing properly. Still, some bosses are awfully insane for a person who doesn't want to waste 10 hours into discovering how to learn the ability that negates instant death effects.
Every single boss before Nyx was a joke, then Nyx is really difficult.
4 was more balanced with boss difficulty, but it was nothing to write home about.
Nocturne's throwing the American comicbook superhero trope at me: get rekt by a boss, come back later and rekt them after preparing properly. Still, some bosses are awfully insane for a person who doesn't want to waste 10 hours into discovering how to learn the ability that negates instant death effects.
****ing Daisoujou.
playing IV atm. SMT 4 on the 3 ds is kinda weird. There is no defense stat so random encounters can kill u (even if u r 10 levels higehr) if you are not careful but that makes it fun. To beat bosses You have to abuse each of their weaknesses since hitting a weakness gets u an extra turn like in Persona.
Magus Sisters weren't even tough to get. Step it up gabby
It's not that. FFX was just one of those games I rushed through when I was a teenager. I only got myself Yojimbo and Anima because they were cool. I'm gonna play the heck out of all FF games once I feel like it.
Basically, I never bothered to get Magus Sisters, or doing many other sidequests either.