Everything Tripwire Interactive (http://store.steampowered.com/search/?snr=1_4_4__12&term=tripwire+Interactive) is currently 50% off with the Tripwire Interactive Bundle (http://store.steampowered.com/sub/40215/) at 66% off!
Now is the time to grab anything you might be missing, or to encourage a friend to join you in your favorite Tripwire game today (by gifting it to them of course)!