Today’s release on Xbox Live Arcade is Trigger Heart Exelica, an originally Japan-only Dreamcast "bullet hell" vertically scrolling shooter, and if that sentence doesn’t make any sense to you whatsoever, that’s totally fine. You see, we’re actually here to mention last week’s Xbox Live Arcade release, N+. It's based on N, the freeware game sensation developed by Toronto independent game developers Metanet Software, but the main difference is that you have to own a......