1 hour ago, Raigon said:
Is it possible for beginners to propose ideas for big companies?
No, it isn't.
Purely for legal liability reasons, game companies do not take solicitations from third parties on game ideas. It opens them up to cases were you propose a game they're not interested in right now, then some years later long after forgetting about you someone else proposes something vaguely similar and they start it up, and then you sue them for stealing your idea. Tossing your idea directly into the shredder without even glancing at the title is _by far_ the smartest thing for them to do.
Let's not also forget the company's employees' own creativity. Why would anyone want to sign up to work on _your_ idea instead of working on _their own_ idea? Same applies to a large company like Ubisoft; why would they work with an unproven and unknown outside party instead of greenlighting one of the countless game ideas their own employees are kicking around by the thousands?
That said, it is entirely possible to be approached by such a company if you make a prototype that's widely known and received. It was common some years back for companies to approach students in competitions like IGF or IGC to hire the team to remake the game as a commercial project. The most famous example of that is Valve's Portal ("inspired" from the student game Narbacular Drop). The important bit is that the students didn't approach Value, but rather Valve approached the students, after they already put a solid year+ of very hard work into a competition-grade student game and demonstrated first-hand that their ideas were actually original and clever, that the core concept actually worked as a game, and that the students could actually do meaningful work coding and designing the game.
