Good old Red Alert 1. Almost plays like the original, with these issues:

- Music sometimes doesn't play when loading a game. Having to turn it on manually is a chore, especially if you have to re-load soon after and it happens again.
- Units sometimes don't attack/move where you click. Having to click repeatedly to make sure all your selected units attack is sometimes necessary, as they appear to keep moving where they were going, instead of changing direction.
- Selecting multiple units often makes them move towards where the selection box ends - disrupting whatever strategy you had and having to re-order your units to go into a direction off-screeen.

Positives:

- Shortcut keys still work, a website easily searchable provides the old ones. Things I didn't know before! Like:
-- Map location favorites. Ctrl+F9 to F12 marks that screen as a favorite, and you can then press F9 to F12 to bounce around the map to your preferred locations.
-- Following units works, Alt+Ctrl+click on unit you want followed.
--
CNC REMASTERED DISCLAIMER
I finished Soviet and Allied sides of main campaign, and some of Counter-Strike missions here. Then switched to CnC Remastered.
It is far superior and much recommended. It is not the original, but it respects your time a lot better and has many positives.
-You can cue multiple units to be built! Not just 1 infantry at a time like in the original.
-Ctrl+N now quick-saves, and Ctrl+L now quick loads. Also it keeps 4 of these quick saves so you don't sabotage yourself.
-Soundtrack is remastered, there is much more bass in tracks, and you can make your own custom playlist. Also no issues as I mentioned above with the original.
-Ability to zoom in and out with mouse wheel. Also resolution is current, and graphics are updated significantly without changing mechanics.
-Lists of missions with badges for difficulty completed, unlike the original which does not track anything. Makes it worthwhile to go back and beat a mission on "Hard" to get that gold badge.
-Mission order is now clear, with branching missions playable any time you want to get a badge. If you progressed enough in the main campaign. All Counterstrike and Aftermath missions are open from the start however.
Odd one:
-Different order for some missions in Counterstrike and Aftermath

TLDR:
CnC Remaster is superior in every way, lots of quality of life changes. I own it on another platform so will not be posting a review.

Cant recommend. I got to the 4th mission in the allied campaign. Im supposed to build up and destroy every unit but I have no way to build buildings or extra units, and its physically impossible to win.