[Lawtan]

Oh, so single-player mechanics/level-up games I may be able to find a few.
It's just that the majority of games have developed issues - better graphics & gameplay translate to hotter computer processors and linear, done-to-death storylines. Multiplayer content takes away from Singleplayer. Free content either advertises, locks part of the game away, uses "pay to win", or uses "pay to customize"...

Et cetera, et cetera, et cetera...