RefleX (2008)

RefleX makes recovery a decision: shield energy returns only while you are neither shooting nor shielding. The same gauge also affects the strength of ordinary fire, so draining it weakens your next attack as well as removing protection. Hold the shield to reflect optical shots and lasers, but dodge missiles, ramming and other physical threats. Pick this PC shooter if you want defence to change when you stop attacking, rather than merely adding another emergency button.