
By June 2019, the team was officially partnered with New Blood Interactive under creative director David Szymanski. In early 2019, John Szymanski joined the project as co-developer, leading to more frequent updates to the game. The focus evolved to a series of shootout spectacles in loosely connected "scenes", each taking only a few minutes to complete. The game progressed with George Mandell as the sole developer, eventually releasing on Steam Early Access on September 19, 2018. The original concept was a sandbox game that focused on immersive movement and weapons handling in open-ended player-created scenarios.

MAXIMUM Action first appeared as a demo on Steam Greenlight in August 2016, acquiring enough support to join Steam that same month.

There is also a sandbox mode for casual play and endless mode, in which the player takes on waves of enemies until they are killed. In addition to the main campaign sequence, players may create their own levels with an included level editor and share them using Steam workshop. There is also now a Workshop in the game that allow you to add new weapons and levels with high support of George Mandell A few weapons are typically given to the player at the beginning of each scene, with the player expected to replenish their arsenal with the weapons dropped by enemies. There are a variety of weapons, each of which can be dual-wielded in combination with any other weapon. Dives are useful for evasion, especially when combined with a "bullet time" mechanic that slows down the passage of time, allowing for high-precision attacks.

Kicks can be used to knock weapons out of the hands of enemies, move tables for cover, or to kick enemies out of windows. The game has a heavy emphasis on fluid movement using dives, slides, and kicks in addition to the running and jumping that is typical of first-person shooters. MAXIMUM Action is a physics-based shooter that takes inspiration from games such as Max Payne, Superhot, and Action Half-Life.
