Topic: Game(s) that you keep coming back to?

For me, the game is Bangai-O Spirits. I got bored with the game a few months after I got it, but about a year later I picked it up again because I had nothing else to play on my DS. I again got bored with it, and now I've just picked it up again a few days ago and I'm liking it. Explosions powered by fruit? Baseball bats the size of three-story buildings? Miniature-sized ninja robots? All awesome.

Topic Question: What's the game that you seem to come back to every now-and-then?

^{@TheMods I'm sorry if the thread's a repeat. My bad if so.}

Mega Man 2 is a game I've been playing over and over since I was a kid. Never gets old.
Recently, Fallout 3 and now Fallout: New Vegas are games that I start up again as soon as I beat. The possibilities are endless and there's such an insane amount of content, its virtually impossible to see it all on a single playthrough.

Let this not be confused with the thread buried in the Wiiware section somewhere.

As for me:

Meteos (Always fun to play here and there)
Wipeout Pure (Some really solid tracks that keeps things addicting)
Warzone (a Tower defense game. Enough said)
Super Street Fighter 2
Guilty Gear XX (easiest to get into a few quick bouts here and there)
Mega Man Anniversary Collection (I play through the games on it roughly once a year)
Star Fox 64 (I've been playing it since I was a kid)

I can't get enough of Wipeout HD Fury's detonator mode! I love turning off the lights and turning up the volume when I play this at night. It's ridiculous how fun it is. This isn't me playing but I wanted to share the awesomeness I'm referring to. I take breaks from the game but I always love coming back to it.

Quite a few but mostly the Zelda and Shenmue games.

Super Smash Bros. and Mario Kart.

F-Zero GX
A Game So good, that I had to get it again!

Sly games
Smash bros Brawl
Mario kart

Oh, and of Course I keep coming back to Sonic The Hedgehog 2 For the Sega Genesis. I've bought it, like 5 times already. Yet I can never get past the final stage.

Oh, and technically Super Mario 64. I never beat it, but I do get about halfway periodically. Then after a while I get sick of dying on the harder levels and start over.

Brawl

@NintyFan I wish I was that good at donkey kong. Im always dying

Ocarina of Time
Perfect Dark
Super Mario World

in that order. There are other games I still like to play every now and then, but these are the games I never get tired of. In a few years I'm sure I'll add No More Heroes and Resident Evil 4 to that list.

World of Warcraft, unfortunately.

Also, Chrono Trigger and Megaman Legends 1 and 2. Oh, and Link to the Past.

For me it's Monster Hunter Tri and Rhythm Tengoku. I love those games and I always come back to them.

InFamous...i just came back to it yesterday and today in fact

Infamous and Super Mario World. I've beaten it a million times but i still love the game that much.

Anything with a "Warriors" in the title.

<3 you Koei.

Also I point you to my avatar. Chocobo games are great when I'm in the mood for light hearted fun.

IWBTG and WarioWare: D.I.Y.

Pac-Man.

Two of my favorites that I go back to often. Ive collected all 120 stars on Mario 64 at least 5 times and beaten Sonic 2 at least 20 times.