To name a few:
Platforming
- Speedrunning Megaman 2 at 8 years old, probably the most finished game on my NES
- Finishing Castlevania (NES) for the first time
- Finishing Mario Lost Levels and it's second playthrough
- Completing Dracula XX/ VK the right way
- Completing CV LOD all modes including Hard modes
- POR LV1 Hard
- OOE LV1 Hard (No Dominus Agony and/or Nitesco Glyph Union) - Clear game, no weapons carried over
- Beating HoD with just the VK and Subweapons (No tunics, or equipment)
- Always getting the girl in Double Dragon
- Completing Muramasa for Wii on Shigurui (1hp) with Momohime, beating the boss after 1 year of not playing within 4 hrs, no swords forged.
Fighting
- Beating a 20 year old as a 9 year old at the arcade SFII : World Warrior, on pixel health with a wakeup heavy DP on Honda stage, he was in disbelief
- A Perfect round fighting Gill on SFIII Third Strike on the hardest difficulty with Makoto, using the big old Xbox control pad
- Winning approximately 100 consecutive matches of SF Alpha 2 at a friend's house one night, went home unbeaten. (18 t the time)
- Being 13 yo and finishing Xmen Vs SF almost times in a row without losing a character at the Arcade, having people 10 yrs mhy senior refuse to challenge. (My Dad got pissed off cos he had to wait for me for 20 mins hahaha)
- Beating some arrogant guy at SFIII Third Strike Arcade version; Me (Ryu), Him (Akuma), he copped the hado-combo into Shin ShoRyuKen taking half his life away, bye bye pride
- So many close moments with fighting games from all generations (versing friends or siblings) I've lost count; some bone crushing mirror matches
(MVC2, TVC, Naruto, Tekken tag 2, BlazBlue and Persona 4 Arena/ Ultimax are especially guilty of this)
- Beating some dude online placed 150,000 spots above me in SFV on my first sitting approx an hour of playing.
Puzzle/ Shooter
- Scoring over 8 million points on Tetris DX starting L9 Marathon
- Placing around 130-140 on the Galaga DX Leaderboards
- Lylat Wars' true ending
Top-down
- Finished Alundra (it was pretty difficult for its time)
- Finished Zelda ALBW on Hero mode (No hearts, Shields, upgrades, or weapon/ tunic upgrades) in 3 days
3d
- Beating both Emerald and Ruby Weapons in FFVII
- Beating Bleach: Soul Resurrecion with no levels/ skills unlocked or acquired (including 100 Shinigami mode where you fight Kenpachi)
- Beating Sonic Generations on first playthrough without acquiring any skills
Racing
- Finishing Daytona Expert mode on PS3
- Beating and acquiring the White Angel in Ridge Racer Revolution (I think)
- Mario Kart (recent); I came 2nd in a tournament with 32 people after not playing MK64 for over 8 years.
Future:
Complete FFXV with all the hunts
Complete Zelda SS on Hero mode with no hearts, shields, or upgrades
Complete Zelda TPHD " as above "
Complete Fire Emblem Awakening on Expert Classic mode