Where's My Lunch?! is an indie adventure whose gameplay is focused on a stealth system. The gamer will have to navigate through small locations, avoid enemies or fight with them. The graphics are made in a low-poly style, and the environment consists of a small number of houses, destroyed cars and power lines. The post-apocalyptic area is filled with evil creatures with red eyes trying to kill all people.

The main character's main task is to find his own lunch during the zombie apocalypse. Having got out from a safe place, you have to travel through various locations where opponents move. The battle takes place with the help of improvised weapons, assembled from individual components scattered throughout the area. The player's ingenuity will allow him to defeat his opponents, slow them down, or destroy them in order to get closer to the goal.

Traps deal great damage to zombies and mutated creatures, and some of them help you escape difficult situations. The character uses wax machines, vacuum cleaners, rakes and many other improvised weapons collected from the environment. The campaign consists of 6 levels, and each of them can be completed through many alternative paths. The player's success depends on the decisions he makes to find the stolen lunch.