The dead from the previous games are back in Rats Invasion 3, configured by a horde of zombies that need to be killed again with the use of logic. Poison and traps were useful for turning living rats into dead. Now that they are back as zombies, this invasion must be fought again using strategies to crush their little bodies once and for all. Use the Mouse to aim and shoot several different items, always leading to a certain end, killing them for the second time. Don't waste the objects, or the puzzle levels will need a reset to be concluded.