Recomendo o jogo, porém, aí vão meus comentários e as muitas ressalvas:

História: 4.5/10
A história do jogo é bem "qualquer coisa", não te prende nem interessa realmente, serve pelo menos para contextualizar os ambientes e fases.

Mecânicas em geral: 6/10
A mecânica é bem interessante, simples, porém leva um tempo pra se acostumar ao principal pilar do jogo: a troca de personagens. Cada um dos personagens tem uma habilidade diferente, e cada habilidade desempenha um papel nos puzzles e nas batalhas. O jogo tem ainda um sistema de upgrade, que serve basicamente para melhorar os combos e conseguir algumas mudanças visuais. A compra de upgrade é com um item que fica mais escondido durante as fases, mas muitas vezes é bem simples de pegá-lo.

Combate: 4/10
O combate é bem simples, porém conta com as habilidades que cada personagem tem, algumas delas me pareceram muitas vezes bem desnecessárias nessa parte. O que acaba mudando isso um pouco são as partes mais avançadas do jogo onde certos inimigos precisam ser acertados por uma habilidade de um dos personagens para eliminar a barreira que o defende. Mesmo assim, o combate é muito fraco e repetitivo.

Puzzles: 6/10
Os puzzles fazem um uso bem melhor das habilidades dos personagens do que faz o combate. É sempre necessário trocar de personagem e usar um conjunto de habilidades para passar de um puzzle. Os puzzles não são lá muito inovadores, porém são interessantes e são apresentados em uma boa dosagem, entre uma batalha e outra. Acaba sendo o ponto forte do jogo.

Boss Battles: 5/10
As Boss Battles conseguem ser um pouco melhores que os combates normais, por terem um design mais trabalhado. A variação dos poucos chefes do jogo é interessante, as boss battles acabam sendo bem distintas, dando a opção de qual personagem usar para se livrar de um ataque do chefe. Apesar disso, não são nada incríveis as batalhas, muito menos algo memorável.

Comentários finais:
Vale a pena comprar se curte puzzles, não se importa com a história e encontrou numa boa promoção.

Party of Sin unfortunately doesn't quite hit the "Action platformer adventure" mark.

The game is a speed challenge, and if that's your thing then I guess you could enjoy it, but otherwise I suggest picking another game.
I bought it expecting what is advertised - an action platformer adventure - but the "action" parts can be summed up as single-button mashing, the platformer sections are incredibly weak and the "adventure" part... Well, I finished the game in less than four hours, so it's more like a short trip than a full adventure.

The game has some "fun" modes which you can buy for upgrade points (which you earn in the missions) such as invulnerability, super speed and big-head mode. Those are fine, except the controls are not responsive enough for the super-speed, and it's crystal-clear the speed challenges were all designed with the super-speed active in mind.

In conclusion: the game is fun, but short, and the speed challenge does not carry it. If you are looking for an action platformer, give it a miss.

Can't recommend this. It plays kinda like a poor man's Trine.
Combat and movement feel rather awkward and stiff. Limited melee range with only 1 of your characters having a ranged attack. Not a whole lot of feedback for hitting/getting hit. Enemies bouncing on your head for 3-4 seconds or visa versa.
The two boss battles I've gone through have been about avoiding 1 hit kills. The first one, who's only attack knocked you into the lava below or the second one who's two attacks caused knockback if you were close enough or instantly killed you if you were under it.
7 Characters is a tad bit too much. Having to remember their keybinds combined with needing to quickly switch between 2-4 characters for puzzles and some characters only being useful for a few seconds throughout an entire level leads to a lot of confusion.
Better off just replaying Trine or something.

I rarely post reviews, but this game has the honor of being the first one I would call "exceptionally bad".
It could be a result of my high expectations, though, as the main idea clearly had a lot of potential.

However, that potential lied in the possibility for creative character abilities, but each character has only two moves; melee and special. These are supposed to be the Seven Mortal Sins - and all wrath can do is headbutt and punch. Upgrade him and he gets some short-range boomerangs. So this became less a game of 7 inherently different characters and more of one character with 7 abilities who can punch people.

The graphics are below par.
I bought for the plot, and it wasn't there.
And the greatest sin throughout the game lies in the controls; having to quickly switch between seven different characters is dreadful yet required for the puzzles.

Perhaps it was released too early.
Perhaps funding was cut.
But the only thing about this game which did not disappoint was the trading card value on the community market.
Perhaps then you can get some of your money back.

This platformer is average but I enjoyed my time with the game, I forgot to mention that the game is short but the No Death Achievements & collectibles might keep you busy (The game also has an upgrade system but you need the collectibles to buy the upgrades & I know the game doesn't have much action but if your a puzzle person then you might change your mind about this game)