Edit the "autoexec.cfg" file in the "\data\config" directory in the game folder by adding the following line:
bind ` "toggleconsole"
Now you can enter the following codes:
Toggle God mode: pl_God [0 or 1]
Toggle no deaths: pl_noDie [0 or 1]
100% health: pl_health 100
100% armour: pl_armour 100
Get all runes: game allkeys