Sky Force Reloaded (2016)

Two local pilots can combine different unlocked aircraft while one clears a threat and the other pauses to rescue an operative. The PC version's longer upgrade campaign makes it suitable for returning to the same partnership over several evenings. It also means repeated stages and equipment growth are part of progress, rather than a pure arcade challenge with everything ready on the first credit. Begin on Normal and choose planes you can both read easily. Make a shared plan for rescue attempts instead of treating the other ship as permission to ignore danger.