I was looking at the witcher 3 and perhaps Divinity 2 or a platformer of some sort, Not sure whats worth the cash?
Im not bound by those 3 though, anything really.

Not exactly a platformer or an RPG, more of a Zelda style game, but Oceanhorn: Monster of Uncharted Seas might be worth a look:
https://www.gog.com/game/oceanhorn_monster_of_uncharted_seas

Massive Chalice is a really nice turn-based strategy RPG:
https://www.gog.com/game/massive_chalice

These two are neither RPG nor platformer, but are indie games I think are pretty great:
https://www.gog.com/game/this_war_of_mine
https://www.gog.com/game/banished

Platformer ?

How about BLACKHOLE ?

Yea those look pretty good, I already tried the bottom two ones, War of mine + Banished
Wind walker one looks pretty

Well it depends on what you already have and how old games you willing to try but a few i would consider are:

*Tower of Time

*Vaporum

*The Bard's Tale Trilogy Remastered

*Grim Dawn

*Kingdom Come Deliverance ( it has a very slow start and can take hours to get to the enjoyable parts and it's not for everyone but i ended up enjoying it).

*Fallout New Vegas

*Gothic 1 and 2

*Morrowind

*Vampire The Masquerades Bloodlines

* The Temple of Elemental Evil

*Arcanum

*Planescape Torment.

*Titan Quest





Just to be sure, by saying Divinity 2 you mean Original Sin 2 and not Divinity 2 Ego Draconis ? and yes i would try out both Original Sin games.

Ive played only the two from those (Morrowind and FNV, Yea i meant Original Sin 2, Was thinking of picking that up even though i havent touched the first one Nice it's in the basket now :) Only a quid

Mages of Mystralia - Frist Day Daily Deal
A Hat in Time
Dead Cells
CrossCode - Daily Deal
Nine Parchments
Moonlighter

Driftmoon is a very good choice

Try Exanima. It's still under development though.

Shadowrun: Dragonfall? Vampire the Masquerade: Bloodlines? Maybe Risen? Jade Empire? Too many to choose from, without knowing what you've played already and what your preferences are.

Divinity 2 is fun though, to a certain extent (gets a bit frustrating and repetitive in the endgame, and you shouldn't play it of you expect a satisfying plot / conclusion).

Here's some 2D platformers/Metroidvanias to look into:

Wonder Boy: The Dragon's Trap is 50% off, and it is a very well done remake. (This assumes you're fine with a game that plays like a game from 1989, though (by default) it looks and sounds much better.)

Timespinner is 10% off, and is a nice queer Metroidvania.

Guacamelee (both editions) is 60% off; the game can be fun, provided you have a decent gaming controller and are not disabled in a way that would affect your ability to play games that require pressing button combos. (Note that the game, at least the Gold Edition, is not color-blind friendly.)

VVVVVV is 74% off, and unlike the game I mentioned before, *is* suitable if you need a game you can play with only one hand, but that can still be challenging.

La-Mulana (remake of the first game) is 70% off, if you are looking for more of a Metroidvania/adventure game hybrid. I should warn you, however, that the adventure game elements (in particular the adventure game style puzzles) are not easy; you can and will get stuck if you don't look at a guide. (I believe it's not possible to softlock yourself into being unable to complete the game, at least, though there are a couple puzzles for weapon upgrades that you can't retry if you fail.)

Spelunky is a great roguelite platformer, if you're in the mood for something that's more about...well, platforming and exploration (including exploration of the gameplay mechanics) than combat or story (and there are no RPG elements, either, thank god). It's a lot more complex and demanding than it looks, but also a lot less random than it might first seem. Every bit as unforgiving as it first seems, though. =)
(If you care about daily challenges, leaderboards, achievements, etc., get it on another platform; the GOG version at least comes with the soundtracks, though.)
EDIT: Replaced a word with a more apt one.

The Marvellous Miss Take is a really cool little point-and-click action-stealth theft game. Nice art style, cool music, very easy to pick up and play, but still pretty challenging, due to the randomized patrol patterns of many guards.

Barony is a nice first-person, real-time roguelike that I just picked up earlier in the sale. It's got a bunch of options (though none to disable permadeath...but there is an undescribed option to enable cheats, so maybe there's some undocumented cheat to allow re-spawning?). It seems to be awesome for online multiplayer, assuming you've got people to play with. (I don't. :P )

That's just off the top of my head.

I can't rave about Tyrannyenough.

At $20 for the Gold edition, it's a steal.

The only RPG I've ever loved enough to play it through four consecutive times.

There are no bad builds, there are no wrong choices... but there is real role-play to be had and it's amazing how profoundly your choices affect the game world.

Darkwood for a surprisingly excellent supernatural horror game that doesn't rely on jumpscares. Somewhat lovecraftian I think. One of the best endings I've seen in a game too, without a doubt the most disturbing one at that.

Mark of the Ninja for a stupidly excellent 2D stealth game in which you can kill or spare everyone (except for a couple of boss enemies)

Underrail - haven't played it yet but it seems to be getting a lot of well-deserved praise.

Satellite Reign for a proper spiritual sequel to the syndicate series in an immaculately crafted cyberpunk setting, and with a pretty long campaign that has good replayability.

I strongly recommend these games:

Trails in the Sky

Trails in the Sky SC

Trails in the Sky the 3rd

Then after you beat those, follow them by these games (all of these games are set in the same world and build upon the previous games and their stories/characters):

Trails of Cold Steel

Trails of Cold Steel II

All of those have some of the best stories & characterization I've ever seen in any game.