Command & Conquer 3: Kane's Wrath.
What a game, really. I've loved the CNC and Red Alert series since RA1, what a classic. But this is, sadly, the best, most recent game out of both series (in my opinion).
I haven't played much of the single player, because WHY? The skirmishes are so fun, there are many different strategies to try out, try different challenges like vs one easy AI and two Hard, capture the easy base early game with minimal resources, e.g. engineer and a few troops, get their tech, have yourself TWO ultimate units, MARV and REDEEMER for example. The unit ranking system is basic but great, very rewarding for looking after your units and keeping them alive through battle trades.
The graphics are great for its age, someone else mentioned about the sound design and yes, I agree, it's awesome. Explosions sound big, siege weapons sound like siege weapons, and units have some great dialogue which you'll catch yourself saying.
Mammoth Tank - "Armoured superiority" "Ready here"
Nod Harvester - "It's time for harvest" "The beautiful glow"
There is still a community out there for multiplayer matches, another reviewer mentioned about the symmetry of the maps, but it's not ALL maps, it's mostly the "tournament maps" which is for... Tournaments. The symmetry is for balance.
However, I do have a gripe for it, and it frustrates me a lot. With so much multiplayer and skirmish potential, I would have loved to have seen more community maps, challenges, missions. But there is almost none through steam. This game is probably past its time to have a big revival, but if you can grab it on a steam sale, I wouldn't hesitate a second.
EA have recently cancelled their F2P model game, which I think is a good move. F2P CnC won't work, I am thoroughly looking forward to a new CnC which will hopefully keep up to this level and more. Don't let us down EA! (Wishful thinking I know)
TL;DR - If the game is on sale, buy it, but don't expect there to be a massive community on Steam. However, there are plenty of people doing game commentaries, one I like is a guy called GreenZero over on YouTube. Check out gamereplays.org too for replays, have a search on google for some custom maps too. I've had many hours of fun with this game (as you can see) plus hours I had with a non-steam copy. Highly reccomended.
My raiting - 4.5/5 I would give it 5/5 if there was better support and community here on Steam.
Thanks for reading my review, I hope it helps!