Operation Defuse blends Counter-Strike and XCOM into async mobile battles

Operation Defuse landed with a pitch that cuts straight through the usual mobile tactics noise: a solo-developed strategy game from Pascal van der Heiden, who previously worked at Triumph Studios, that mashes up the logic of Counter-Strike and XCOM. The difference is in how you play it. Instead of locking you into a live session, it uses a play-by-post structure, so turns happen whenever each player checks in.

That shift changes the whole rhythm of tactical combat. A standard shooter or squad strategy match asks for reaction speed and uninterrupted time; Operation Defuse is built around flexibility, letting players jump in, make a move, and step away without killing the pace. For mobile, that is the real hook. It fits the way phones get used in the real world, where interruptions are constant and long, fixed sessions are often the first thing to get cut.

Van der Heiden’s game also leans on a competitive setup that feels more deliberate than a throwaway mobile clone. Operation Defuse pits terrorists against counter-terrorists and promises fair, cheat-free battles, which gives the async format some bite instead of turning it into a passive puzzle. The design also reaches back to older play-by-post and letter-based wargaming traditions, which makes the concept feel rooted in strategy history rather than slapped together from familiar genre parts.

That pedigree matters because the project is aimed at iOS and Android, where many strategy releases chase faster monetization and louder presentation. Operation Defuse instead has a no-ads policy planned, as long as patron support continues. That puts it in a very different lane from the usual free-to-play fare, and it suggests van der Heiden is building for a narrower audience that cares more about clean systems than endless retention tricks.

It may never be a mass-market hit, and it does not pretend to be a twitch-friendly shooter for everyone. But for players who want XCOM-style decision-making without having to block off an evening, Operation Defuse makes a clean case: the best mobile strategy game is sometimes the one that still moves forward when you have to put the phone down.