We have 2 cheats and tips on Xbox 360. If you have any cheats or tips for Ikaruga please send them in here. We also have cheats for this game on : GameCube
You can also ask your question on our Ikaruga Questions & Answers page.
On any difficulty setting complete the game from beginning to end and these features will become available options.
When you beat a level on any difficulty setting without ever shooting or dying so you get the DotEater achievement you'll be rewarded with Dot Eater leaderboards. If you manage to make the top 100 and your replay will become available for everyone to see.