Some more hints.
#27: Guessed by Darashiva: Jagged Alliance
#26
a) Dwarfs and elves on a hexfield.
b) Win with fewer turns to have more gold for the next level.
c) The game gets updates and additional content for over a decade now.
d) Control your armies one turn at a time.
e) Fight in a Tale of two brothers Under the burning Suns for The heir to the throne.
#25: Guessed by The_Liquid_Laser: Starcraft/Broodwar
#24
a) Control a red blob.
b) Eat PCB (printed circuit board).
#23
a) Doubles the amount of fairies compared to the direct predecessor.