Thundercats is a brilliant game based on the highly successful cartoon series and takes the player through a wide variety of levels.
You start off having to slice and dice the nasty people who kidnapped members of the Thundercats team and stole the magical eye of Thundera. You play Lion-O, one of the main characters in the cartoon. The game is basically a beat 'em up, but such a well designed and implemented one you just flow along enjoying every minute. The game of course gets more difficult as you get on to the later levels, each one with its own full colour picture of someone from the cartoon at the beginning. The graphics on the levels are just as detailed, but with slightly less colour. Sound is also excellent with a tune at the start and plenty of in-game effects. Extra weapons, lives and bonuses can all be collected by shooting the mushrooms or trees. The extra lives are a must for collection, as you don't start with that many.
Thundercats is a fab game. Buy it if you didn't before.