BF2 wont even work on my pc. I tried downloading the demo, my card isent supported. I have a geforce 4 ti 4800 (Its always been a good card till this game).

Legendary mode is best to play at. All the dungeon monsters are like 1-5 levels ahead of you. On easy mode you are often fighting like monsters your own level or slightly below, on legendary they are higher. Plus you see harder monsters sooner so you will see vampires on like level 3 or 4 whearas on easy you wont see them till like level 8 or something (So you also get better loot or you have better chances for better advanced loot). Also when you get really deep you see hard monsters that never even appear on easy mode. Theres some other extra things about legendary mode like that, but its generally more fun because its a bit more difficult and you have to plan a bit more.