Some really useful info in this thread, thanks. But I would like to ask: how scalable are Unity and UT4 on mobiles? For example, if I make a game with a minimal size (just bare bones) and then add lots of graphics, how much will the size increase? Is it linear? Does it get progressively more compressed with more data?
And one more thing, what is the best (or standard) resolution for mobile games?
Just for clarification, I' talking about a 2D game, with some 3D elements (mostly menu and parallax effect between sprites to create depth).