This might be one of the worst Overwhelmingly Positive-reviewed games I've ever played. I'm sincerely concerned that the people giving this positive reviews have never played any good game remotely in the same genre, so they don't have a proper reference for what this should have been doing.
The one good thing about the game is that the music is pretty good. Whoo.
The actual gameplay? Atrocious. You start with one basic combo. It has no hitstun or knockback. Even the most basic mooks will interrupt your combo. In a game where this is your primary way of killing enemies, this is unforgivable. You are then expected to go through a prologue with only basic attacks and the ability to dodge-roll a fixed, aggravatingly long distance that more likely than not either puts you out of range of your combo or leaves you open to another attack.
It's also your first introduction to one of the game's most despicable design plays - it drip-feeds you basic functionality as you go, well after you needed it. Instead of feeling like a proper upgrade, it comes off as the game jerking you around with an underpowered, weakened moveset while expecting you to interact with everything as intended.
It rapidly becomes clear that the game fancies itself closer to Dark Souls than the 2D beat-em-ups that seemingly inspire this game - you are expected to parry and dodge roll around enemies while delivering your combos. This is a grievous mistake on two levels: first, Dark Souls and similar games rarely confront you with more than two or three enemies at once, and sufficiently powerful hits will put them into hitstun and make them easy to dispatch. This is not true for Anomaly Agent, which gleefully throws 3+ minions at you and expects you to juggle their desynced parry timings and roll about like a drunken monkey while your attacks do nothing to stem the tide. Second, soulslikes don't often make use of unparryable attacks in group fights - usually, they're the purview of big solo enemies or boss fights. Anomaly Agent, however, introduces the shotgun clone, which fires ranged, unparryable attacks.
Let me just start a new paragraph for the shotgun clone. This jerk is literally the single worst game design sin in the entire game, because he violates all of what the game expects you to do. Your attacks have no hitstun, so you can't stop him from attacking. The special moves you're given that DO stun, don't stun for very long. He's ranged, so he's not in the same cluster of enemies as the melee mooks you're fighting. His fire rate is about once a second, so you need to interrupt everything to roll about - but because of the range gap, this often means either rolling away from your targets or into new enemies that can hit you. His bullets have a big enough spread that you can't jump over them (not that there's much point in jumping, your air attacks are so bad that Little Mac is a better air fighter than you). Since they're unparryable, the most likely outcome is that you are trying to parry incoming melee attacks or some other ranged mook's bullets, and can't avoid getting hit by the shotgun blast. In short: the single worst enemy in pretty much all of video gaming, for all the wrong reasons, because the devs took the wrong lessons from Dark Souls.
You're given upgrades you can buy. They're mostly forgettable. If this got tagged RPG because you can buy upgrades, a curse upon all who tagged it RPG. To wit: a not-insignificant number of upgrades revolve around poison damage. Poison damage ticks so slowly and for so little damage that they're easily the worst possible choice you could make. Why is this even an option?
Do not buy this game. If you're thinking about it, consider first if you've played either Shovel Knight or Guacamelee. Shovel Knight is a fantastic game that perfectly captures the retro feeling this game is clumsily trying to invoke, while Guacamelee shows you what you can do with weighty combos and makes you feel much better about dealing with groups of enemies (on top of being 4 player local co-op!). Both of these games would make you much happier than Anomaly Agent - I promise you.
P.S. Who's the jerk that thought the moving outdoor shipping container platforms should make this aggravating high-pitched screeching sound that's so unusual you swear it's coming from outside the game? You're a jerk.