VGFacts

I've got 20$ to spend on XBLA , anyone know some good games?

Megaman 9
Megaman 10
Scott Pilgrim
The Walking Dead Season 1
The Walking Dead Season 2
The Wolf Among Us
Castlevania: Symphony of the Night
Castlevania: Harmony of Despair
Castlevania: Mirror of Fate
Shadow Complex
Guacamelee Super Turbo Championship Edition ("Free" on Xbox One)
Sine Mora
Bloodrayne Betrayal
Metal Slug 3
Portal
After Burner: Climax
Crazy Taxi
Sonic 1
Sonic 2
Sonic 3
Sonic and Knuckles
Sonic Episode 1
Sonic Episode 2
Sonic Adventure DX HD
Sonic Adventure 2 Battle HD
Banjoe Kazooie
Banjoe Tooie
Streets of Rage 2
Trials HD
Trials Evolution
Trials Fusion
Beyond Good and Evil
Bionic Commando
Bionic Commando Rearmed
Bastion
Comix Zone
Outrun
Perfect Dark HD
Outland
Resident Evil 4 HD
Resident Evil: Code Veronica X HD
Quantum Canundrum
Skullgirls
Doritos Crash Course
Doritos Crash Course 2
Dead Rising: Case Zero
Dead Rising: Case West
Dust
Fez
Limbo
Ikaruga
Lara Croft Guardian of Light
Marvel vs Capcom 2
Street Fighter 2 Hyper Fighting
Street Fighter 3 Third Strike Online Edition
Minecraft
'Splosion Man
Ms. 'Splosion Man

Just a few from my Xbox collection that I'd recommend.

Geometry Wars 2 is a very fun game if you like reaching for high scores and shooting everywhere.
Rocket Knight is also a nice XBLA game.
Ilomilo if you want to be angry at a cute game.

Castle Crashers
Minecraft

EDIT: Bumble Bee Tuna already mentioned Minecraft. I guess I better go learn to read.

Alien Hominid.

Super Meat Boy.