Bionic Dues (2013)

Four customised Exos travel together, with only one active at a time. Procedurally generated equipment gives their weapons, defences and abilities different strengths, so switching machine changes which tools you can use against the current threat. Choosing which facilities to attack also affects preparation for the final assault. Turn-based action and a wide difficulty range leave room to learn. Build a complementary toolbox, then work out when each machine should take the lead.