FarCry!

This game rocks! FarCry has amazing tropical scenary with amazing graphics assuming you have a 2GHz plus computer with an ATI Radeon 9800 or other graphics card with 128MB of ram. It's pretty tough, so I would first play in easy mode. And it is going to be optimized for AMD 64 Bit computing soon which will make it look even better. The best looking game made to date! (Until Doom 3 and Half Life 2 come out later this year)