Development
Design
Video game developer Digitalmindsoft announced Call to Arms on their website in December 2012, calling it the "true successor" to the Men of War series. The developer saw an opportunity to develop a real-time strategy video game set in the modern day, especially with the gameplay common to the Men of War series.
The developer planned for two playable factions and an assortment of other features for when the game was released, and planned to extend the game through additional units, factions, and maps thereafter. Digitalmindsoft planned their factions to be asymmetric, fun-to-play, and fair. The factions are based on modern factions. Digitalmindsoft also planned to allow the player to control a unit's specific actions in a third-person view, similar to Men of War: Assault Squad, as well as allow players to build their own mods for the game. For the single-player mode, Digitalmindsoft wanted to implement what the players wanted, though they were aware that they were limited by their crowdfunding campaign. Digitalmindsoft said there would be a focus on the infantry-level interaction rather than an interaction with heavy weaponry such as tanks and airplanes, but that heavy weaponry would be playable.
Although Digitalmindsoft had improved on the series's gameplay mechanics in Assault Squad, the company wanted to continue to focus on ease-of-gameplay improvements in Call to Arms. Chris Kramer, managing director of Digitalmindsoft, noted that there was a balance between making the game realistic and between making the game well-balanced and easy to play, as well as a balance between freedom-of-choice and game balance. He later made the point that the two games would play differently because they were set in two different periods of time, owing to the change in warfare. When asked about the quality of Men of War series co-developer 1C Company's games Men of War: Vietnam and Men of War: Condemned Heroes, Kramer said it was more important to self-improve than to critique 1C's games. Kramer also said that Digitalmindsoft was designing a new cooperative system relative to Assault Squad.
Lace Mamba Global was announced as the publisher in December 2012. In early 2015, PC Gamer reported that the publisher would be the developer, Digitalmindsoft.
Players who purchased the deluxe edition could beta test the unfinished campaigns. In the multiplayer mode, Digitalmindsoft wanted to integrate the personnel units first and then later the vehicles.
Game engine
In January 2013, Digitalmindsoft released a video of the game physics, which Rock, Paper, Shotgun (RPS) said "showed a game that looks a lot like Men Of War with better voice acting". In an interview published shortly after, Kramer said that the game would make use of an updated GEM game engine to allow for better game performance. In February 2013, after another routine release of game screenshots and a video, RPS agreed with their earlier statement about the appearance of the game. In June 2013, Kramer thought that the engine should get a new name, because he found it "hard to believe the difference with all the improvements." RPS agreed, with journalist Jim Rossignol suggesting that he would "be in heaven ... if someone could create a sci-fi game with the same sort of engine fidelity." Men of War: Assault Squad 2, released in May 2014 before Call to Arms, was also built using the Call to Arms engine, which PC Gamer identified as an opportunity to test the engine.
In June 2013, Digitalmindsoft wanted to include "integrated in-game video capture software", and support for Steam was assumed.
The game has a map and mission editor, which support Steam Workshop. The game also provides a replay function.
