Mounts

The single player campaigns will include adventure maps that the players can explore for various purposes by using one or more heroes, which will be able to walk around or use mounts (and some even vehicles).

There are some creatures that will only be mountable by certain heroes only, which are marked as unsuitable.

Avarice
This realm currently has no suitable mounts, but it's the only realm where heroes can drive.
These vehicles are able to drive further than mounts, provided they have enough fuel/power.

Mech - plasma reactor that allows recharging some points daily.
Hovercraft - no terrain penalty, can even travel over water easily.

Envy
Cycloper - can pick up nearby resources and artifacts without walking.
Night Stalker - can leap to new locations, great for bypassing obstacles.

Unsuitable
Scorpius - tends to travel underground.
Razorback - has problematic back spikes.

Gluttony
Uncle Fungus - can leap to bypass terrain penalty and water.
Moss Hound - bonus movement points while on gluttony terrain.

Lust
Magma Spawn - damn slow, but no terrain penalty.
Volpyr - can incinerate some obstacles to make way.

Pride
Stomper - slow, creates dust cloud.
Royal Guard - can view way further.

Unsuitable
Troglodyte - fragile legs and blind.
Chimera - 2 heads lead to confusion.
Abolished - burning back that melts.

Sloth
Nightmare - extra slow, provides a defense bonus.
Adaptation - requires settle, can pass over water.

Unsuitable
Impaler - has very fragile legs.
Ice Demon - has spikes on the back.

Wrath
Flesh Cleanser - regains some movement on combat victory.
Satyr - provides a bonus offensive stat when attacking.

Unsuitable
Nutcase - has tentacles on back.
Headless - blind, deaf and spiky.
Horn Head - gear, blind and deaf.
Sarcophag - has spikes on back.