Some of my biggest achievements in collectings:
1. Acquiring some of the rarer consoles like TurboGrafx-16, Sega Saturn, Neo Geo Pocket Color, and Sega CD (and then having my Sega CD stop wanting to read discs
)
2. Some of my more rare games (nothing too special, though):
-Castlevania: Symphony of the Night (PS1)
-The Dungeons & Dragons Anthology: The Master Collection (PC)
-The Legend of Zelda: Wind Waker (Gamecube) - Not sure why exactly, but this one is expensive now.
-Mega Man: Legends (PS1)
-Parasite Eve (PS1)
-Radiant Historia (NDS) - Soon to be sold.
-Resident Evil 2: Dual-Shock Edition (PS1)
-Splatterhouse (TG-16)
3. I'm so very close to 500 games. Like only 3 titles to go.
4. I own the entire Super Mario series up to Super Mario Galaxy:
-Super Mario Bros. 1-3 (NES)
-Super Mario World (SNES)
-Super Mario All-Stars (SNES)
-Super Mario Land 1-3 (Game Boy)
-Super Mario Advance 1-4 (GBA)
-Super Mario 64 (N64)
-Super Mario Sunshine (Gamecube)
-New Super Mario Bros. (DS)
-New Super Mario Bros. Wii (Wii)
-Super Mario Galaxy (Wii)
Well, all of them except Super Mario Deluxe (GBC) and Classic Mario Bros. (NES). And I don't own a Wii U or 3DS, yet.