Saw Strike Suit Zero and Strike Suit Infinity are 75% off on Steam. $4.99 and $1.74 respectively. Haven't played it yet, but wanted to post as it only is discounted until Dec 16th. From what I've read, Zero is a campaign progression game where Infinity strips the game down to a wave-survival/horde mode kind of experience. Steam Link for the bulk package with links to the individual games within. Reviews were up and down from what I hear. Singleplayer only. Indie/Kickstarter. Almost a year old. Here are some videos.
I picked it up because I had been eyeing the game for a while. Won't have time to play it until the holidays.
ooo boy THIS game, i recommend not picking it up unless there have been some major changes since release.....
I thought it was pretty fun, but I haven't played it much. I only played it about 2 hours to try out my gaming with a mouse vs a joystick (which I really suck with btw). Anyway, updating because if it wins the Steam Community's Choice vote in about 2 hours, it will be $5 again. In case anyone was waiting for a sale.
Just a heads up, this game is in the currently available Humble Bundle. Just have to pay more than the average, which is a little more than $5 at the time of writing.