While i got the ending b, i can say i sorta finished Dead Rising 1 and got a gist of it at the very least. I really enjoyed this game, truly one of the most unique games i've played. Gameplay is as advertised: you really get to use anything in the environment against the zombies, plus slaying them has never been more fun. Also the time management aspect added an interesting aspect where i had to manage whether to save someone or focus on the story. Game's without its annoying moments for sure tho, since there were instances of frustrasting bosses so i resorted to minichainsaws for those encounters, and the iconic dumb survivors are as dumb as they say. Also the zombie numbers is outright insane how the hell they pulled this off i'll never know.
Either way, game absolutely earns its replay value plus the knowledge of the layout of the shopping mall will come in handy for future playthroughs. Very fun game.

UPDATE: Got the true ending and thoughts still stand, didnt care for the final boss but Overtime mode was certainly interesting but i will stick with 72hour mode for now.