An interesting game, but not interesting enough for me to play it twice.
Credit where credit is due, 27λ does have an unusual card-based battlefuck. It took me a couple of battles to get the hang of it, maybe because the tutorial botches its job, or maybe because the so-called Queue is not a queue, but is a one-dimensional board instead. You place the basic cards into positions of your choosing on this board to create beneficial patterns. The perk and skill system, which allows you to pick the types of beneficial patterns available for activation is your character build. It allows —in theory— several emergent playstyles. In practice, it seems any build that doesn't go heavily on defense or healing will have a rough time.
But the system does allow a playstyle around the pink (lewd, corrupt) card type, so it is a proper battlefuck. Battle animations are fairly well-done, although the enemies are represented only as floating grabby hands and floating tentacles/dicks/dildos.
But everything else... The story just falls flat. I just don't care about any of the dialogue with these randos that I'm about to beat up. It's not well-written in my opinion. The two supporting characters aren't faring better, the "boyfriend" is never present, and the fat bastard is... well, a bastard. A cardboard cutout prop, not a character. And the sex writing is of similar level, with gems like "he inserted his genitals into your vagina." Yay, quality.
The biggest issue is how the game handles corruption. You get corruption, naturally, by being fucked in battle. But the maximum corruption is gated by you losing fights, so you need to lose twice to progress the NTR plot and to unlock corruption past 33, and then again at 66. This is SO FUCKING LAME.
I was having some doubts whether this game deserved four stars in spite of all the drawbacks, but then it dawned on me: I'm overly generous here, because I have a strong bias for unique battle systems. Even if the end result falls short, which here, it does. It's a card roguelite that I had zero desire to play after less than one full playthrough. So, 2.5 stars at most, generously rounded up to 3.