I know somewhat pointless due to a remake on the way. I have a lot of great memories playing the classic version on a few platforms. You get a few paths that alters boss fights to a degree. Most ports adds a lot to make it a truly replayable game. Original Mode is hands down the best mode. You also get Boss Rush mode as well as a firing mini game. There's some truly rememberable creature designs. Saving a lot of people can notably help you out. Otherwise just keep on shooting to find stuff or take out enemies. The soundtrack is absolutely amazing with some good sound effects. If you can get pass the not great voice acting. This is a fun game to play with a friend or family member.