A friend and I played through Scott Pilgrim Vs. The World The Game a few weeks ago. Very neat, the length is a bit short but the combo possibilities are enjoyable.

Cameron wrote:

I tried beating Demon's Crest last week but the last boss is the single most ridiculously difficult boss enemy I've fought in a video game ever.

Are you talking about the final story boss or the ultimate hidden boss? Both are beatable with some patience and a ton of Ginsengs, but watching this video reminds me of how tough it is to be evasive in that game, especially when so much has happening onscreen at once.

I remember swapping between Armor and Fang/Hand talismans throughout the fight. When he's in the locked position form, go for damage since he's an easier target. When he's in the mobile form, go for defense and evasion. I don't think I've ever used spells in that game, so I couldn't say if any are beneficial.

Honestly, if you mind the talismans, a large amount of the remainder is luck. Keep trying and you'll get it.

Although I've already played through normal mode a few times, I recently completed Hector's Hard Mode in Fire Emblem (Game Boy Advance).

Some random notes about my playthrough, you can safely skip this if you've never played the game (and if you haven't, you are doing yourself a disservice). Otherwise my ramblings may interest you.
[SPOILER:49570864a7]The crew: Hector, Kent, Lucius, Oswin, Guy, Priscilla, Nils/Ninian, Raven, Merlinus. Other random characters used as necessary. Game completed with no deceased characters (if someone died, I restarted the chapter).

Lyn's mode is basically unchanged, even on Hard difficulty. I only wanted to use Kent and Lucius for the later stages, so I focused training those two. Kent experience-sponged this part of the game, reached level 20, and I used Wallace's Knight Crest on him before defeating Lundgren. Pretty neat.

Hector's Hard mode forces you to be ridiculously ballsy in the beginning, as the game sends wave after wave of enemies at you without much room for error. Furthermore, you are significantly limited on available units in comparison to Normal mode, so trying to both defend your team as well as run across the map to open chests can be pretty punishing. Double-attacking anyone for the first few chapters is pretty rare.

I feel that most games on Hard difficulty get easier as you reach the halfway point and obtain more combat options, and Fire Emblem is no exception. Namely, when I obtained Guy and Raven (who arrive as enemies and must be recruited), their Hard mode stats are greater than their Normal mode stats because of the game's enemy-leveling mechanics. Guy, Priscilla, Nils/Ninian and Merlinus have ridiculously high Speed and Luck stats, so they can typically be placed in the middle of a map to safely aggravate enemies.

The only genuinely frustrating moments I came across were certain maps where the enemy team is loaded with mages using long-range status condition staves. Unless I missed a secret shop opportunity, for the majority of the game you only get one Restore staff to fix status conditions, which is not much help when you're being spammed with a wave of Sleep, Silence and Berserk staves each round. Some of these levels literally came down to hoping the enemy missed, as the team's resources are too strained to prepare much of a safeguard.

I gave Guy a few stat-boosting items, but his level-ups were extremely bountiful. He maxed out HP, Strength, Skill, and Speed on his own, had high Luck, and nearly capped Defense and Resistance. If something had to die, just use Guy.

Oppositely, this playthrough resulted in my worst Lucius ever. He normally had no problem maxing Magic, Speed, Skill, and Resistance in my previous playthroughs. This time around, he barely capped Magic, even after I gave him Afa's Drops (which adds 5% to all of his stat growths). However, this is all that's really needed for him to be an efficient healer, so I cannot really deem Lucius's performance as detrimental.

I wanted to use Canas, as his dark tomes are extremely versatile, but by the time he arrived my current team was filling up the available slots, so Canas was benched this playthrough. I held onto a Luna tome for Athos during the last chapter, though. 'Cause hey, Luna is broken as hell in this game.

I derped hardcore during my first fight with the Dragon - I parked Priscilla within its attack range while she was holding a Bolting tome (a very heavy weapon), so she was instantly doubled. I think that's the first time I've made that mistake, but at least it was pretty humorous to be one round from winning the game and suddenly, oops.
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I'm going to try out Sacred Stones on Hard mode next. I believe the experience will come down to how much I abuse monster grinding, since the Tower of Valni is an early option to level up units and overthrow story mode balance. Guess I'll try to avoid it for as long as possible to make a truly difficult experience.