Hold the yard against waves of hostiles. Every cleared wave earns a weapon or survival upgrade, and every fifth brings a Juggernaut. Clear wave 10 and you get sent to the front.
Blue team against red on one of three battlefields: night fields, a snowbound pass or a sunset town. Capture and hold A to E to drain the enemy's reinforcements. Scavenge guns and ammo from the fallen, and hunt down glowing upgrade kits.
Click resume to lock the mouse and get back in.