A good game hampered by uninspired execution and missing features.
Semper Fi: Large open map/s, with detailed terrain, very good ambient sound, allowing some options for mission completion. Realistic ballistic drop, performance, reloading and usage (weapons actually function R handed), and a wound modeling system to specific body areas, requiring you to seek temporary safety to self administer first aid and/or use your team medic's abilities. Mission completion success even though some objectives may not be achieved. The need to use on the fly planning, tactics, and stealth (at times) to close with enemy installations or groups, prior to exciting combat game play. Runs very smoothly at high GFX settings on my year old gaming DTR notebook.
Boot Camp: 11 mission SP campaign + 7 stand alone missions. Little replay value due to not being able to play through missions with different weapons, which dovetails into the failure of CM's to provide an armory function for pre mission weapon/equipment selection (makes sense for the infantry fire team but certainly not for the SF fire team), or allowing you to switch between fire team members, thereby being able to play with different weapon sets. Given the very short campaign; DR should have offered the option of playing from the PLA perspective, once the initial USMC campaign was completed (same for the armory function). Both of these NOT included features would have significantly increased DR's replay value. No save game function; causing frequent reloads and replays through extended sequences due to infrequent check points (or check point triggers you've missed). No lean function, preventing shooting from behind cover (horrible oversight in a "realistic" game). Non functional realism features such as a dual beam aiming laser module on you weapon you can't use (ever), lack of ballistic stabilisation on Abrams tank main gun once you've lased the target, artillery and air strikes identified in the pre mission briefing, but never available in game etc. Useless night vision due to extremely high night time ambient light. At times, mission scripting that is so linear it negates the open world of DR. Mission failure if you are killed (instead of falling back into one of the other fire team personas and continuing the mission). By many accounts; a broken multi player component.
Nether world: Mission editor allowing you to create your own, though no instructions on how to use it. Average AI; sometimes it's artificial intelligence, sometimes it's artificial idiocy. GFX; some object models are distinctly average or worse even at high GFX settings, skys, sun and moon are particularly bad.
Final verdict: A good game that could have been superb if only a few features had been included or executed differently.