Ace Combat Advance

The sixth game in the Ace Combat series and the first one to be released on portable consoles (Game Boy Advance). You fly as "Ace" in what appears to be a prequel to Ace Combat 3 Electrosphere. Released in 2005.

Tropes found in the game

 * Foregone Conclusion: Advance has you trying to protect the remaining independent republics from corporate takeover, but it's pretty clear in Electrosphere that it ended up happening anyway.