I don't wanna sound like a pansy, but it's a bit hard because, usually, you need two players which would significantly help gameplay. However, I'm a bit of a loner. Buy a copy with a friend first and foremost!
Top down twin stick shooter with a funny theme and great fun. Little bit of zombies ate my neighbors, little bit power pete, little bit robotron. Buy it play it.
Tower 57 isn't a terrible game, but it has a lot of faults.
The basic game design is sound, but the extreme difficulty (even on easy) often feels unfair and very unforgiving. There are also plenty of in-game bugs, such as your character's special ability firing without your input. This did come in handy once, but most of the time it's an annoyance because it uses it up when you'd probably rather save. Add in that ammo and health packs are used immediately (even if you have full health or ammo) and only save points are used, and you have a game that almost seems like it strives to be difficult over fun.
I know some people will love the idea of a game that's hard and punishing, and that's fine; however, if you're on easy, you don't expect it to be as difficult as many other games' hard modes.
So what's good about Tower 57? Well, it's a lot of fun in co-op (both online and local) so long as you expect an extreme challenge. Tower 57 also offers numerous characters to play — three male and three female — each with their own weapons, tools, and special abilities.
An interesting game dynamic is the ability to replace and upgrade body parts, each doing something different. You'll need that too, as certain enemies can tear off limbs, and even the tutorial goes so far as to force it on you.
All in all, Tower 57 is a decent co-op title, but I'd only recommend getting it while on sale, and I'd suggest staying away if you're planning on playing single player. Something else to note is that Tower 57 is truly DRM-free, so you don't need Galaxy to play online co-op. I have no idea if the GOG version of Tower 57 plays nice with the Steam version, but I imagine it probably would. You might want to check the Steam boards for that; unfortunately, the boards for this game are sparsely population on GOG, so you're not likely to receive an answer.
The shooting sections are fun, the dialogue is well written.
Where I pass is finding a person in a large top down map with multiple floors with one floor standing on top of the given marker where he should be (but isn't there and the other floor you're unable to get to him either). I genuinely despise searching for 20+ minutes to come to no conclusion on how to solve or find something in a game.
"Dieselpunk" sounded so good i had to get it, and even gift to my friend until i realized how poorly made garbage i had juist bought. The only game im sad GOG really doesnt practice refunding about.