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GTA was not made to look 2d. It is 2d drawn in a 3d environment.
So therefore it would be just like a tilemap game. The thing is since it''s 3d, they can also place models in the maps. Thats why the buildings are 3d etc. If you gave GTA a tomb raider view, you''d see a flatness, and some 3d buildings, heh. If you didn''t notice everything is a sprite except the buildings... anyways.
Yeah it''d be easy to write an RPG like that. I''m writing a game like that, not an rpg though.
CrappySoft - game production team with a punk attitude. Mail me if you want to make levels, art etc.