There are tons and tons of available Star Wars: Battlefront 2 Mods ... mod for SWBF2 that adds the Mass Effect era to Instant Action. You can fight as the Systems Alliance, the Heretic Geth ...

When I first booted up Battlefront Halation, I went straight to the Instant Action (in classic Battlefront 2 fashion), selecting a few random maps for the playlist. Loading into UNSC Angler ...