is it possible to make an rpg that changes into a platform game on certain levels? if so can i combine any type of game? would it affect speed too much if i do?
its possible, just u need to adjust all the graphics cause rpg/platformer/puzzle/what ever else may not look same. as for performance, the performance is determined about how u use the events and how many actors u have on screen and how often they update or perform an action.
its already done, in so many mmorpgs, where u have puzzle games, platformers, shooting practice etc, and the mmorpg, all in 1 a good example is wizard 101 has same principle just the other games are mini games. but u can switch for the rpg to turn into platformer for sure or anything else u want just u need alot of programming (events - each game will have each set of event sheet and then u just need a menu with levels that sends the player from 1 gameplay to another .simple )