Paradox Interactive today announced that Frontline: Fields of Thunder, the first chapter in a new RTS series developed by Nival Interactive and N-Game Studios, has shipped to stores in North America and is available via download on Gamer's Gate. Frontline: Fields of Thunder follows in the footsteps of the original Blitzkrieg and incorporates the best aspects of the now classic RTS games. It also features a new reinforcements system and lots of gameplay tweaks. Additionally, players will notice that the typical promotion system found in Blitzkrieg 2 has disappeared. In Frontline: Kursk there is only one hero, the player, who gets the experience as well as the ranks and rewards. A playable demo can be found here.