Split Circuit Arena cuts one robot in half and gives each player a side

Two players share a single combat robot and the split is physical: one of you drives the left side, the other drives the right. Nothing about that arrangement is decoration. Moving in a straight line means both halves pushing the same amount at the same time. Turning left means the player on the left backing off the gas while the other keeps the pressure on. Jumping means both of you hitting the button on the same millisecond, or the machine does something else instead. The developer’s own line is that driving straight requires a board meeting, and that is a fair description of the input model rather than a joke about it.

The weapons follow the same rule. Melee hardware mounts on the left and the right separately, so the loadout is an argument you have before the fight and a handling problem you carry into it. In a physics game, asymmetry you bolt on is asymmetry you then have to drive, and the store page is honest about where that ends up — a beautifully uncoordinated death machine, assembled by two people who each only own half of it.

Everything else is physics rather than numbers. You ram rival bots into walls, fling them into environmental hazards, and take the impact back when it goes wrong. The arenas are built with traps that are equally happy to destroy you or to be used as tools against somebody else, which means positioning is a shared job too: the half of the robot nearest the hazard is not the half that decides whether you go near it.

The opposition is the part that separates this from a party toy. You are not clearing swarms of mindless bugs. You fight rival combat robots with their own weapon setups, built specifically to exploit the fact that your machine is run by a committee, across escalating waves where dynamic difficulty raises the pressure the longer you survive.

How Overcooked’s kitchens force you to communicate is the closest reference. Its argument is that most co-op games manufacture teamwork by handing players different powers or different information, and that Overcooked does something better by giving everyone the same tools and letting the room do the work. Split Circuit Arena takes that one step further down: the players do not even get separate bodies. The shared object is the character itself, so there is no version of playing well that does not involve saying out loud what you are about to do.

Controllers control everything makes the case that the device in the player’s hands is a design decision rather than a delivery detail — it sets which actions feel natural and which ones never quite do. This game is that argument in its purest form. Half a robot per gamepad is a control scheme that no single player could ever be given, because the whole point is that one brain cannot reach both halves. Gamepad recommended is not a footnote on the store page here; it is the shape of the thing.

What makes good AI? matters because of what the enemy machines are for. Good enemies are legible and consistent, built around the player’s experience rather than around being clever. Bots designed to exploit a lack of teamwork only work if you can see them doing it — if the flank that punishes you is readable a second before it lands, the fight becomes a communication test with a clear answer, and if it is not, it just looks like the physics ate you. That legibility is the difference between an escalating wave system that gets funnier and one that gets tiring.

Split Circuit Arena is by Knifing Mantis, self-published, listed under Action and coming soon on Windows. It supports both couch play and online co-op, plus Remote Play Together, so the second pilot does not have to be in the room — though the shouting probably works better if they are. A gamepad is recommended, and given what the control split is doing, that reads as the intended setup rather than a preference.

The scope looks well judged. There is no matchmaking to maintain, no progression grind, no stat inflation to balance — just waves, hazards, weapon mounts and two people failing to agree. A game whose entire hook is a control scheme lives or dies on how the machine feels under four hands, and keeping the surrounding systems small is the right way to protect that.

If the appeal is a co-op game built around one shared object rather than one job each, Keep It Up! is the other one on this list — a whole team, a single balloon, and a room designed specifically to make you drop it. Same idea, opposite temperature: one is careful and one is a demolition derby, but both make the object everybody is touching the real level design.