• There will be two game modes : Campaign and Stopwatch.
• Campains game mode will usually consist of three maps with XP, then the XP reset at the end of the campaign.
• Stopwatch game mode consist of two round on a map, the attackers try to win the round the faster they can while the defenders have to slow them. In the second round, the defenders become attackers and have to beat the time of the precedent attackers in order to win.
• Each level will have one or more objectives for both teams.• The maps will be divided into several territories. Each territory will include a precise objective for each side, in addition to secondary objectives that help and encourage the team to complete their primary mission.
• Each level will be based upon a specific backstory.
• The maps are designed for 24 players, but a server will be playable by up to 32 players.
• There will be several landscapes for the levels, the majority will be external.
• The "Megatexture" technology, developed by John Carmack (Id Software), allows you to display complete landscapes up to 2 km.
• The richness of the vegetation and the dynamic lighting system will allow you to hide easily.
• The command map will allow you full access to specific team-related information. Including which territory is under control and where the action is taking place.
See here for GDF classes and here for the Strogg.
• Each side has five distinct classes.
• You will be able to create a Fire-Team (a squad).The squad leaders will have full command.
Clicking on an enemy structure will show it to the members of the squad and order them to destroy it. Clicking on a wounded soldier will show him to the medics in the squad and order them to treat him, etc.
• You will be able to see the inventory of a character just by looking at him.
For example, an engineer who is out of mines will have an empty tank. A Strogg Meditek will have his Stroyent measure half-empty on his back. Etc.
• The power of the Stroggs soldiers comes from only one source: the Stroyent. You will be able to decrease your health to increase your ammunition or vice versa.
See here for GDF vehicles and here for Strogg vehicles.
• The vehicles will not be awarded as a 'power up' as in other games. Each vehicle will have a precise job.
• The surface of the ground will have an influence on the control of the vehicles.
• It is possible to shoot out the tires or the ammunition of tanks of vehicles.
• Some of the vehicles will be brought by a flying transport vehicle (Magog Cargo Plane for GDF).
• The vehicles will be easy to control, but will require some precision and insight to fully exploit them.
• Some classes will be able to "call" a vehicle which brings a structure which is in relation with the class.
See here for details on GDF deployables and here for Strogg deployables. 
• The game will assign small objectives to each player, which is especially useful for beginning players. Small awards and upgrades will be awarded for the completion of each task. All tasks will prove important to the team as a unit.
• Acquired experience will be useable throughout a campaign. Upon campaign reset, all player experience and upgrades will once again be reset to 0