So, one of my projects essentially has it where you are fairly strong at the start already, but shortly after the start, you end up getting an insane amount of power. Now, you can actually choose to keep all of your powers (this is actually canon in that particular game), but you can also choose to sacrifice pieces of your power to do various tasks. In the second game, you essentially have to make the same choices, except it is canon to start losing your powers. (First game is more about you being consumed by power and essentially taking over the world until you finally find a reason to redeem yourself, second game is essentially a side story of after you've redeemed yourself and now your power is needed elsewhere).
Now, I've been working on this game for a while and keep remaking it when new tools come out (RPG Maker VX Ace, now RPG Maker MV).
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So that being said, what does everyone think about such a concept? Where you start off as strong as you can be in the game, but have to make choices that may result in you becoming weaker.
Obviously, in my case, this is in a game where even at the weakest state, you could beat the strongest enemies, as the battle mechanics are based more on strategy and solving mysteries than actual strength. (I even have an easy mode and a no combat battle system).