You play through the game with it beginning as a TPS/FPS and after a few challenging missions, it turns to RTS/FPS. Very fun.
Get it for $6 at GoG. And the topless patch, if you really want those boobs. Then add the graphics patch for a bit more aesthetic value. I had a lot of fun with the game.
A topless patch? Ahahah. You've got to be kidding.
You don't need that kind of patch. The developers purposefully created a separate texture file and flaged it so that folks would notice it easier and remove it. They were very upset about having to add that tid-bit, but Wal-Mart wouldn't carry it in stores otherwise.
In any case, I believe the latest graphics patch automatically restores everything to the original Japanese version (with the exception of loading screens).