Firstly, the inf health option makes the guy who has the katana near the Firelink Shrine (and maybe other similar enemies) also invincible. I also used the instakill option and it wiped out every NPC in the Firelink Shrine. Some disappeared, some were dead, etc.
* Updated game trainers and cheats daily
* Get notified when new cheats are added
* Request which games get new trainers
* Priority support with any problem