The Good: As always stated: Multiplayer. Renegade is a game that mixes shooter and RTS to form a wonderful teamplaying game. You need to have skill, and insight, a combination which lends for a great gaming experience. Although renegade's engine might be considered shitty by some, I myself love it. The whole way everything looks and moves, I love it. Plus it's a source of so much fun, including throwing hummers off the bridge of mesa and sending arties into blue hell, and of course, flaming sbh. The whole way everything works in multiplayer (the differences between GDI and Nod, yet still the balance, the bugs, the teamplay) just makes it so much more fun, and more addictive, than other games.
The Bad: The fact that is was rushed last-second created a lot of holes in the game, most noticeable in the armada of bugs that are present. Single-Player is also quite boring, it's just an endless repetitive stream of Nod soldiers, Nod soldiers with bigger guns, a boss with the biggest gun, and then more nod soldiers. Sometimes in vehicle is thrown in, but there's not too much you can do with them.
The Ugly: The music. Frank Klepacki could have done a way better job, as he always has.