UFF

Raiden Fighter Jets, Gradius V and just about any bullethell shmup I've played.

Also... Centipede.

There is numerous shmups that bored me to the point that i never played them again, but i don't remember me stopping playing any for high difficulty, that's it.

Hydorah, from about the last quarter of gameplay.

Pretty much every single one when I start playing, but then I get the hang of things.

Infinity's End wrote:Pretty much every single one when I start playing, but then I get the hang of things.

This.

Also Hero Core Hard Mode, puts 'hard' in hard mode.
Worst offenders are Reaper Drone and Grand Mother.

Mushihimesama Futari

Stage 1

i suck so much

Currently it's Kamui.
THE SLOWDOWN LASER.

Hellsinker

Segment 5 with Deadliar

Segment 4 with Minogame

and Segment 6 with Fossil Maiden

.....and Radio Zonde on Mortal Mode

[][][][] wrote: Also Hero Core Hard Mode, puts 'hard' in hard mode.
Worst offenders are Reaper Drone and Grand Mother.

Grand Mother isn't hard O_O
The Splitter of Stars is harder.

This.
Though it's called YGS 2000 it isn't.
and oh god stage 4 (and everywhere beyond stage 4)
Prolly because I turned slowdown mode off and forgot how to turn it back on

What IE said, except I never get used to them.