[5] In Forts, the player builds a base, defends it, and acquires weapons through tech trees in an attempt to destroy the opponent's reactor.

The game has been reviewed by CG Magazine and Kotaku, the former of which described Forts's gameplay as being similar to the Worms series.

There are various weapons like missiles, lasers, cannons, miniguns, and mortars to attack with, with defences like metal reinforcement, sand bags, machine guns, and flak to shoot down projectiles and defend yourself.

Teams are able to choose one of 15 commanders from 5 different factions each with their own unique active and passive abilities, in order to augment their playstyle.

[10] Community driven tournaments have been organized, of which many had the developers help out and grant an in-game badge reward to the winner.

The official tournaments are varying team sizes, and have prizes for the top three players as well as a name mention in the winners announcement.

[16] The Moonshot DLC was released on 18 June 2019, which costs 7.99 USD, it included four new weapons (Howitzers, Smoke Bombs, the Magnabeam, and the Buzzsaw.

The Pro HUD DLC includes a new color palette in game for the weapons, materials, tech, and devices tabs, new sounds when interacting with the in-game menus, and a unique medal that can be seen in lobby by other players.

The main addition of the DLC is the addition of naval forts with buoyancy physics, along with six new weapons (The dome, Orbital Lasers, Planes, Decoys, Naval Missile Launchers, and Deckguns), a new ammo mechanic, a new campaign, 23 new tracks by Ella van Dyck, several new maps with 17 new dynamic backgrounds, a new HUD and a High Seas badge for all owners, 5 new mission types, and a revised learning curve for new players.