marurun wrote:UN Squadron is a rather unique way of making a shooter more console-ish. The idea of leveling up and also earning money to spend on secondary weapons is something I haven't really seen done since.
Tyrian 2000 has a money system that buys ship upgrades and weapons, along with needing to balance out your power; both your shield (regenerating health) and your weapons use it, so if you use the super expensive weapons you can't take many hits. I believe Raptor: Call of the Shadows also had a money system.