Good game.
Challenging at first, until you get the sniper rifle. After the sniper rifle everything's downhill as you can easily pass one more level to get the flamethrower, at which point the duo is unstoppable. Flamethrower for unlimited spam that takes out everything small at close range, and the sniper just decapitates anything in a couple of shots. Good upgrade for mechanics though. Cars, foods, extra antidotes to collect for OCD sake, barrels, and some interesting zombie types. Jumpers and babies kinda surprised me, best zombiework since the jetpack zombie.
Overall, 9/10 4/5. ~WCCC