Which Game Was That Again?

An Amazon review begins: "i got game n kil rat mutate over n over untl bad dude kil me ouch. i like game lot n rats r cool n stuff wen thety mutate n try to kill me daed ouch!"

It continues: "It ok to play n shoot bad dude n i get game n tell u to get game to kil rat an bad dudes in ur guns u kill rat. Ok great good but no ok good great just ok good great good. Get."

This is a user review, of course. A glowing one based on the star rating.

Can you guess the game it's about?

The answer.

Via game designer Martin Hollis' Twitter feed.

PIC