Good Flash Games

Hey there, I'm going to have to mark this as not a fit because it's not a question that asks what the best products are.

I am looking for a specific game I forgot the name of.
You are a robot, you fight aliens.
the game has some story.
the game is a demo,
you can get the full version for a few bucks.

that's about everything I remember.

if you know the games name then you definitely got my upvotes and stuff.