I have tried the PC thexder cheat (old MS-DOS version) and it does not work. I've ran the game on XP SP2, 2000 SP4, dosbox versions 0.70 (my most recent) and the one prior to that, which I forgot the version # for. I've seen some sites that say turn on caps lock, start the game, then hit "esc,y,esc" or hit "esc, y,n,y,esc" and it should give you full energy or make you invincible. I get neither . Does anyone know for sure how to do this correctly? I originally bought Thexder when I was about 10, and it's taken me 22 years to get to the 4th level. Needless to say, I think I deserve to get to cheat after all this time. Thanks.