Originally Posted by F Swan
All achievements can be unlocked after changing the default settings, extra lives, difficulty.
Same goes with all EX options.
The only achievements that are locked are the no continue clearing each of the levels, but thats only if no bullet mode is selected. All other EX changes are fine.
I'm pretty sure you get the no bullet mode after 45 game over screens, this is the last EX option, so all others will be unlocked before this.
Sorry, but what you meant?