Recent reviews by 

Pretty good short mod, feels like it could be in the base game.

Good fun, limited ammo and health makes you use all the available abilities and weapons to survive. Restarting an encounter is quick and makes killing the demons even more satisfying. visuals and performance are good as well.

Game launched before it was finished, most of the content (game modes, maps, etc) from CSGO is gone. Even less content than had CSGO at launch.
Another annoyance is that this game replaced CSGO and removed all of the achievements that anyone earned.
VAC (the anti-cheat) is a gamble too, between the obvious hackers even in casual servers and random errors like "Losing connection to VAC servers" that kick you out of the game and need a file repair and restart. the VAC connection error prevents you from playing all other games that use it but the connection error only happns in CS2...
On the positive side, the new smoke grenades are great.

pretty janky over all and not that easy to run, but fun if you got a decent squad/friends to play with. also the game defaults to third person view for vehicles and there's no way to change it, it even goes back to third person if you change seats, extremely annoying.

Pretty good game if you like playing PvP as the hunter class because everything else seems to be balanced around that.
Has its moments elsewhere too.

It's good. Extreme value for money with the extra episodes/expansions plus the co-op horde mode is fun if you can fins someone to play with. A particular standout is the Enyo expansion which completely changes the look of the game to a cyberpunk dystopia setting complete with awesome custom music.

good roguelike with cool ancient Egypt theme. Plenty of guns to pick up and scrolls that give you different bonuses or handicaps. you can choose modifiers that give you different start guns and powers.

just like the original but with slight improvements to give the player more options for bosses.

All these reviews that say performance is bad are form a year back, now it runs well and theres no real lag or rubberbanding issues, the only problem is the loading time but that has gotten better with the last patch too.

An arena shooter where the characters have different abilities and health pools. Its a pretty fun game looks nice and plays similar to quake 3. Sadly like seemingly every other multiplayer game these days the matchmaking is quite bad.

why do i keep getting free half-life spinoff's in my library?