10 1 5Once you beat the game for the first time, all levels will have the Red Cross removed. So simply play all levels again, in any order to unlock this.Do NOT select new game after beating it once. It has to be done on the same save.Showing all 5 comments. Leave a comment. Just wondering if the levels increase with difficulty the 2nd time around?Posted by Rowdawg88 On 08 Oct 19 at 23:06 I have not noticed Any increase in difficulty, just do like I did stock up on bombs and Shields and it’s a breeze!Posted by Hitman Darkness On 03 Jan 20 at 19:51 It seems like the final level still has to be Attack on Earth with all the bosses since I have beaten the game once but can't select that level yet. Is that true?Posted by LausDomini On 15 Aug 20 at 03:58 LausDomini yes that is true. Once you beat all the levels the second time then attack on earth will unlockPosted by smittykid On 07 Oct 20 at 03:41 I grinded out 99 shields (sooo boring) and was shielded for literally the entire final level. As long as you time your bombs for some of the fights as opposed to spam you'll be fine. Turbo fire helped too.Posted by Chucklestyle On 21 Mar 22 at 08:27 Leave a comment