It has it various bugs and glitches, but the game is very well done. Godzilla Unleashed is a great game.
The game has 23 monsters, and 3 secrets, making a total of 26 monsters. I won't spoil the secrets, but I'll tell the others.
The Earth Defenders are the monsters that want to get rid of the crystal threat(More on that later). You can get on the ED's good side by destroying normal Crystals, which are the small, green ones, but becareful, because destroying them can make you go Critical Mass(More on that later) and you will lose ED points. You also lose ED points by gaining power surges. The monsters in the ED are: Godzilla 2000, Angurius, Fire Rodan, King Ceaser, Mothra, and Varan. 2 of the secrets are also in this faction ;)
The Aliens want nothing more than to take over Earth. They see the Crystals as a source of power for their taking, so destroying normal crystals loses points with them, as well as destroying Alien millitary. You also gain Alien points by gaining Power Surges. The different monsters of the Aliens are: Gigan(Final Wars Version), Megalon, King Ghidorah, MechaGodzilla I, and Orga.
The Global Defence Force, or GDF, are the mechs, that defend humans and human cities. You lose points with them by Destroying cities and human military, but you can gain points by finishing a battle with as little city damage as possible, and by destroying Alien millitary. The monsters of the GDF are: Kiryu(MechaGodzilla III), Mecha King Ghidorah, Moguera, and Jet Jaguar. The last secret is also here.
The last faction is the Mutants. The Mutants are crazy. If they fight you, they will gang up on you, but if there are no enemies, only Mutants, then Mutants will fight other Mutants. Mutants love destruction, so destroying cities will gain poins with them. You lose points by not destroying things. Another thing that gaons Mutant points is going Critical Mass. The monsters of the Mutants are: Biollante, Krystalak, Obsidius, SpaceGodzilla, Titanosaurus, Destoroyah, and Megagurius, making the Mutants the deadliest faction out of the 4.
The story mode gos along through graphic cutscenes, like a comic book. However, the voices of the characters don't line up with the subtitles, however, thats no biggie, and yyou can turn subtitles off. The story is about a Crystal Meteor that crashed into Earth, making Crystals pop up everywhere, and cause the cities to each have a disasterous theme. Seattle is full of Lava, Tokyo is flooded, London has been lifted high into the atmosphere, Sydney has been covered in a snowstorm, San Fransisco is full of EarthQuakes, and Osaka is full of Toxic gas, preventing millitary from working there. The last 2 areas, Monster Island and the Aline Mothership, don't have the themes, the Mothership, however is crashed in San Fran bay.
Critical Mass and Power Surges are the new 'Rage' system from the past games. In the past games, collecting a Rage Powerup made your monster faster and stringer, and allowed yo to do a powerful attack specific to the monster. Rage has been split into the Power Surges and Critical Mass. Critical Mass accumulates from destroying crystals, and gaining crystal energy. When you gain Critical Mass, your monster gains size, and bursts at the seams with red energy. Power Surges comes from 2 sources: Desfeating a monster that has a Power Surge(Story Mode) or destroying a power Surge crystal(Brawl Mode). Each Power Surge has a different ability, like the Fire surge gives you more attack power, the Darkness Surge absorbs projectiles, and the Chrome Surge gives you a shield. After each surge, wit the acception of the Fire Surge, you can do a shockwave burst. The Fire Surge, however, allows you to breathe a Hyper Spiral Ray, which is a powerful beam of energy.
The many bugs and gliches in the game can get annoying. The battle with the Atoragon in New York gets annoying, as the Atoragon can face upward when doint the Crystal Cannon and the Ramming Speed attacks. I rememebr once that Megalon got stuck on top of a building, and Kiryu special ability, the Absolute Zero Cannon which freezes your enemy, aims downward instead of foward. However, building a game from the ground up instead of using past monster and city models, would make overlooked gliches.
Overall, I give the game an 8. Without the bugs and gliches, it would be a 9, and with Online Play and no gliches, it would be a 10. However, bugs and all, it is a fun game to play, especially with a friend.