Userlevel

The Viewer source code shows that there are several levels of "God Mode" (each level has all the previous levels' powers):

GOD_NOT

Value: 0 (Presumably the default "God Mode" status given to every logged-in user)

GOD_LIKE

Value: 1

• rename objects without modify permission

GOD_CUSTOMER_SERVICE

Value: 100

• Toggle character geometry
• Take copy
• Owner To Me
• Set To Linden Content
• Claim Public Land

GOD_LIAISON

Value: 150

• Enable land auction

GOD_FULL

Value: 200 (Difference from GOD_LIAISON not apparent)

GOD_MAINTENANCE

Value: 250 (Difference from GOD_FULL not apparent)

Note: text borrowed from SLwiki, shared under a CC BY-SA 3.0 license