Syndicate was an "okay" shooter. I picked up for $15, so wasn't overly disappointed, but I was ready for it to be over about 3/4 of the way through.
Syndicate's main mechanic is upgrades you can unlock after you defeated certain enemies and obtain their chips similar to the one implanted in you. These different unlocks can link together to give bonuses, but overall, there were no upgrades I really saw and went "Oooh, I gotta have that". The upgrades help a little but not much. By the end, you don't receieve very many, either. You still seem to be fairly squishy and die somewhat easily. The other mechanic here is these software programs that you use like special powers. You can force a guy to kill himself and he explodes hurting others, you can convince someone to fight for you (they aren't especially helpful, but it removes an enemy and distracts others) and you can temporarily knockdown/disable an enemy by making his weapon backfire. These skills are useful but would have been more compelling to have more than just three skills.
This brings me to a very frustrating aspect of the game. There are certain bosses or sequences that were brutally hard in my opinion. The overall pacing of the game is up and down in terms of difficulty. Some bosses took 10+ tries to overcome while others was a straight up piece of cake walkover. The frustrating sequences were enough to almost uninstall this game. I was along for the ride but reluctantly many times.
The mouse control in my opinion is not very good. Aiming didn't seem smooth at all, typical of a lot of console ports. It's not game breaking but not what I come to expect from a game on PC (but not surprised considering its a port). As I mentioned, about 3/4 of the way through the game, I was rushing just to finish it to uninstall to make way for something else. There are definitely better shooters out there. If I could take it back, I wouldn't want to pay much more than $5-10 for this title.