Sudden Strike:

Sudden Strike is set during World War II and offers elaborate Russian, German, French, American and British Missions. The fantastic depth of the game, the endless tactical opportunities and the magnificent game play will never cease to enthral you. Capture enemy fortifications; win the fight for possession of the buildings and call for paratroopers and fighter bomber reinforcements.

Sudden Strike Forever:

The game adds four new campaigns -- one for the US in the forests of Western Europe, one for the German in the snowy fields of Russia and one for the Russians in Eastern Europe. There's also a new British campaign that simulates the battles of North Africa. Sadly, each "campaign" is composed of only three missions. While the missions of Sudden Strike are usually much larger than those of other games of its type, three missions per campaign seems pretty cheap. Rather than having four half-assed campaigns, I would much rather have seen a whole British campaign of twelve missions.

• Sudden Strike:
  
  • Up to 1,000 units per scenario.
  • Bridges, houses, fortifications, trees and other objects are destructible.
  • Multiplayer mode with up to 12 players and 4 teams.
  • Realistic battle simulations and explosions.
  • More than 40 exciting missions.
  • 3 different campaigns in summer/winter landscapes.
  • Construction of fortifications, pontoon bridges and much more!
• Sudden Strike Forever:
  
  • 4 campaigns with a total of 12 missions
  • 7 single missions
  • 20 multiplayer missions including completely new multiplayer games
  • More than 30 new units
  • Summer, winter, autumn and desert landscapes
  • A map and mission editor
  • Faster, improved interface
  • Officers increase surrounding units experience
  • Players can determine their field of view with a pair of binoculars
  • Vehicles, e.g. tanks, can now be driven backwards
  • ... and much, much more!