Typing Of The Dead: Overkill is absolutely brilliant. Yes, it's a lightgun game that swaps the lightgun for typing words on a keyboard. Yes, it's crass. Yes, it's rude. Yes, a thousand times yes, but that's all part of its unique charm. Better yet, you can get it for just over £4 at Green Man Gaming with their Y2OZM7-MJ3VHD-0AVTI1 voucher code, saving you a tenner.
The DLC is also on sale, and hilarious. Thanks to M_the_C @ HUKD!