In role-playing contexts (GTARP, etc) NVL means "No Value of Life". It's widely frowned upon by many RP communities, as NVL activities rarely lead to any substantial role-playing gameplay and is generally not realistic. Whether it's a character going around crashing their car into other players for no reason, or murdering players on sight without trying to RP a situation, NVLing is just boring for anyone who is trying to play a different way.
by Soundyman April 14, 2021
In a Visual Novel or Role Playing game, NVL is where the text box basically encompasses the whole screen and the sentences come out in page format. In contrast to ADV where there's a text box below the sprites and the sentences come out line by line.
In fighting games I prefer NVL because the text comes out by the characters mouths. In visual novels I like ADV because the text is all together like in a book and it is at the bottom of the page so it doesn't cover up the beautiful character drawings.
by sharris-jh August 27, 2015