Addicting/Replayable Games

Swords of the Stars: The Pit?

Super Hexagon

/thread

EDIT: So I actually read the post... Nah, still going with Super Hexagon. Also, nice choices of games. If you liked RUNNER, might I recommend Bit.Trip Void and Bit.Trip Fate?

Dota 2 if you hate your life like me.

Cookie clicker!
Lel even tho it isnt "replayable" and u just click on a cookie

Peggle is the most addictive thing i have ever seen on my gaming history but if you have Xbox or PS3 i suggest to buy the game on these platforms(The only difference is they have multiplayer and leaderboards but thats important i think)

Torchlight when its on sale. Even at full price, its amazing.

Plants vs zombies, Faerie Solitaire, Terraria, Defender's Quest, Portal 1 n 2. All these are extremely replayable for me.

Sine Mora is quite something if you're up for such bullet mayhem.
I dunno why but i spent like 150+ Hours on Terraria.

Don't Starve is a game just for you. I know it is cuz that list at the top is just like mine. Highly "replayable" though.

Rogue Legacy

Spelunky!

Dark Souls ಠ_ಠ
it will hurt you and kill you all the time but you will always be back for more.

the replay value is incredible in this game and you can get it for $7.50 atm

Audiosurf and Beat Hazard, both high quality games, both have a high replay value providing you have a decent music library and enjoy your music.

X3:Terran Conflict/Albion Prelude, not indie I'm afraid, but they're both excellent games that if you stick with them you'll get hundreds of hours out of. Be warned that they aren't for casuals, and some people complain about the learning curve though.

Mount & Blade: Warband, It's kinda indie in it's development, and it doesn't come with a "large" pricetag. This really is one of my favourite games, I played a hundred hours or so on the original Mount & Blade, and then Warband improved on that even more. There's no specific "story", there's not really much of a pattern in how things are affected but there is opportunity to do very similar playthroughs each time if you want to (which obviously if you want replayability you won't be). You'll want to stay away from the multiplayer on it generally, the singleplayer is what really makes the game stand out.

Garry's Mod was something for me that was very replayable. Quite a few different gamemodes, and mods if you were into sandbox. I have to admit it's seen better days the last time I went on, the servers were dwindling a bit, but it's still a pretty decent game especially for the price. (Do need at least one Source game though CS:S is best)

Terraria is fun and replayable, though I definitely haven't played it as much as some. For £5.99 you really can't go wrong. Should be a large update coming soon for it, so if you wait and you're interested you could get it for as little as £1.50.

don't forget the 12th is steam's 10th. . . . should be a sale. Dungeon Defenders is pretty sweet. . . that and unepic.

Kerbal space programm

Terraria, also BL2 is practically at an indie price point now.

SW KOTOR I or II

Skyrim?

Came to say TBOI but since you've got that covered... hmm...

Lots of gameplay but maybe not replayable: Anodyne, Cave Story+, LIMBO, Fortix

Dungeon Defenders...? ._.

Sol Survivor, if you have friends to play it with. I don't know how many times I've completed the campaign with friends.

Reussssss

Also Sol Survivor and Civ V (of the games OP didn't mention)

Orcs Must Die! 2, Magic DOTP (any year), Triple Town, and Terraria I must mention since I've played them a lot and all have replayability

Tetris.