Warrior
He/She fights always at the front and won't probably need anything except Brawn and Vitality.

Rogue
Can open locks, disarm traps and find secrets. It's probably a matter of opinion, whether that class is useful or not.

Caster
Can perform useful spells to protect the party, deals high damage with sparks, can stun enemies for several rounds and has no range limit. You really want one of those in your Team! Except for a high intellect, the caster doesn't really need anything.

Shaman
I think he is basically something like a Paladin or Cleric, because of his/her abilities to heal and also wear heavy armor and weapons. So he/she will need a basic level of intellect for spells and also enough brawn to wear all that stuff. But that means he/she can't have as much HP like the Warrior, because there are not enough points for Vitality left. My recommendation is to leave him/her in the backline, because he/she needs to perform spells anyway all the time.

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Green Bar: Hunger (if it's completly empty, the character begins to starve)
Yellow Bar: Experience (the Character has reached the next level when it's full)

Brawn: Determines how much damage the char can deal and the maximum load that can be carried.
Agility: The Chance to dodge damage and to hit a target.
Intellect: Affects the maximum MP
Vitality: Affects the maximum HP

HP: Hitpoints
MP: Manapoints

AC: Armor Class

Load: In the picture she carries 20 of a maximum of 44. Being overburdened slows down the movement of the Party.

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By holding the left or right Mouse Button and performing one of the Gestures, the Party will move or turn in that Direction. Some Players reported that it can be really confusind and/or annoying to perform such a Gesture by accident while maybe picking something up. If you don't like them, it is possible to turn them off by activating the "Traditional controls" in the Option Menu.

All Spells don't have a Range Limit.

Caster

• Sparks: Causes a certain amount of instant damage to the enemy
  
• Armor: Gives the Party a AC Bonus for some turns
  
• Stun: That Spell stuns the enemy, which can't do anything for a few turns
  
• Empower: Grants the Party a Hitbonus for some turns
  
• Breach: Reduces the magic Resistance of the enemy by 50 %
  
• Immunity: The Character can't be harmed for some turns
  
• Dismiss: ?

Shaman

• Heal: Gives everyone in the Party a certain amount of HP back
  
• Expose: Lowers the AC of the enemy for a few turns
  
• Poison: The Enemy will take some damage over time
  
• Restore: Heals everyone in the Party (don't really know the Difference to the Heal Spell yet)
  
• Regenerate: The Party will regenerate 1-4 HP + the Shaman-Level as HP for some turns
  
• Immunity: The Character can't be harmed for a few turns
  
• Resurrect: It will resurrect a fallen Member from the dead