Out of all the "boomer" shooters that have been made, none of even managed to capture the sheer ambition of Turbo Overkill. If you ever wanted to see the feel of Doom Eternal replicated but through a much smaller dev team then you can't go wrong with this game. It's the most ambitious boomer shooter ever created but at the same time it can also come back to haunt it in a lot of ways.
As far as boomer shooters or even just shooters in general, Turbo Overkill is one of the most challenging I ever played. It's not just combat that is a hard time but also the sheer amount of platforming the game has too.
What makes combat so challenging where Doom Eternal has glory kill to replenish health back and chainsaw for ammo. Turbo Overkill at best gives you an upgrade you could by where killing fodder enemy with a chainsaw leg can get you back 1 hp. With ammo you have to find pick ups all over the map.
It does keep Doom Eternal's combat model of being having high HP one minute and then being down to critical the next.
Due to the lack of glory kills and chainsaw, the horde battle are even more intense than before. Every battle is an intense battle for survival. I'll be going through an enemy wave and then mech enemies pop up and I'm like, "damn it" after it kills me.
This is one thing Turbo Overkill does really well. The enemy variety is top notch one you'll be killing mooks with the chainsaw leg one minute, then switch to shotgun or assault rifle to kill the shield enemies, then use rockets to kill the drones, then running and shooting for your life when the mech enemies show up.
The weapon line up while standard like pistols, shotguns, assault rifles, sniper rifles, rocket launchers and so on. There are some insane alt fires you can have like the sniper having a telefraggins ability, shotgun having shock blasts that can be lined up, the pistol having a charge ability that can level most enemies if line up well. You even get a variation of the Hammer of Dawn from Gears of War here which is always interesting to see in the context of this kind of game.
Level design and platforming also returns from Doom Eternal and they can be quite expansive to how big the space can be. The levels can take so long to complete that it felt like I complete an entire episode of many boomer shooters even though I only did one level. There's levels that take place in wide open cities, traffic, destroyed cities, toxin refinery, factories, a scrapyard and so on. Each one of these levels can take a 30 minutes or an hour to complete. They have lots of platforming then lots of intense horde shootouts, then hunting keys and so on.
It doesn't end there either, there will be levels will you will be riding your car then the maps get bigger and then infiltrate structures while riding the said car, then getting out to progress the level. You'll in a motorcycle chase and then a mech late game. A late game set piece will also happen where an entire army gets wiped out as you are barely trying to survive while platfroming through the level.
In terms of sheer and utter ambition Turbo Overkill almost has no rival.
The sheer scope does come back to haunt the game. For one the upgrade system while interesting, it gives you a tons of perks and options but once you find the one that you are most comfortable with, you never want to try anything new.
Platforming and this might be me playing on a controller can so hard even analog stick can't even keep up like with the grapple hook mechanic, half the time I get past these sections by luck.
By far the biggest issue with the game is how long it is. Remember how I said that one level in TO can be as long as a single episode in many boomer shooters? This is what I'm talking about. The game can especially around Episode 3 can drag on for so long that by the time Maw was defeated I just wanted the game to end already.
It leads to the actual final showdown against Syn and to say this last level was hard would be an understatement. It's so hard that it dampers my experience on a game I really enjoyed. You not only have to defeat multiple challenging waves of enemies but you have to do in a time limit too. You already have to not die but also kill the enemies fast enough too. Then there is a late part where you have to use a sniper where you stand in one place since not all enemies can be telefragged and you could get hit and die here too. Doom Eternal never had this. Then you get to the actual final boss against Syn and it can take a lot of damage before it dies too.
By the time I got to the sniping, I lowered the game to easy and finished the game. I was just getting so worn out by everything that I wanted everything to wrap up. If the game ended with you killing Maw, I would've been fine with that.
Overall, while Turbo Overkill might just be the most ambitious and insane boomer shooter ever, I really just wished the game end earlier so it could be my favorite boomer shooter of all time.