The game's primary innovation is its . Unlike traditional tower defense games where enemies follow a set route, Fieldrunners lets players place turrets anywhere. This forces enemies to navigate around the structures, effectively letting the player design the path themselves.

: It offers Classic , Extended , and Endless modes across varying difficulties.

: Players utilize various upgradeable weapons, including Gatling guns, Goo towers for slowing enemies, and powerful Missile launchers.

: As waves increase in strength, players earn money from defeated units to buy and upgrade more towers. Free vs. Paid Access