I tried out dragon Quest with what appears to be a successful attempt,but when i try to install secret of mana or adventures of mana, i am unable to start up the app even though it says the installation was successful. I'm using mobilism market to download and astro file manager to install as someone else had suggested. My phone is a Samsung Galaxy s7 edge. (From Verizon if that matters) i don't need to root it do i? (If that's the case then why would i have been able to install dragon Quest and play it) i will attach a screen shot of the screen i an brought to when attempting to open a file that was supposedly installed this way. https://imgur.com/gallery/SlM4t

After attempting to select anything when i reach that screen, i am told "unfortunately, secret of mana has stopped"
Adventures of mana gets a different screen when i attempt to start it,but the same error occurs when selecting anything.

For final fantasy 9, i get this page https://imgur.com/gallery/tdVbN and when selecting yes, it appears to just reopenthe same page with no progress. It also downloaded the game from mobilism market unnaturally fast. This should be a large download but it took no time at all.

I found out what was going wrong. I was missing part of the installation to these other games. The Mobilism Market app does not have the descriptions before each download saying which downloads were which and so I was only downloading the first one and then missing the obb file. I found this out by using my computer and finding that there were other files, the other download links werent just mirrors. (This could be a bit clearer to avoid this type of confusion)