You've got a nice library there bro. Go play Besiege. I still haven't played it, but from what I've seen at my friend's place, that game is a lot of fun.

You should play those Penumbra games. They're not too long and have a nice creepy atmosphere.

Oh, and Dishonored.

Finish Half-Life 2 then go for the Episode One and Two.

Have you seen StratO ?

Besiege is a great game

Dark Souls: Prepare to Die Edition
Game of Thrones - A Telltale Games Series

If you like being a manager and enjoy sports. I can recommend you football manager on steam. -75% discount should come around thanksgiving or winter sales.

Dishonored would be my recommendation. Dark Souls if u want to kill yourself every three deaths :D

• Trine 1 & 2
• Portal 1 & 2
• Dishonored
• Sam & Max
• Tales of Monkey Island
• Fallout NV
• Bastion
• BioShock
• HL 2
• Puzzle Quest

Fallout or Bioshock. NOW!
Edit: Seems like you have touched both, but not he second Bioshock, so DO IT NOW!

Seems by your playing hours you like the sanbox games.
I can propose a Terraria (you play it about 2h) or Starbound (you didn't play it yet). These are two cool sandbox games that close each to another.
Choose the Starbound, if you prefer a science fiction. Terraria - for fantasy fiction.

Suggest you games to play from your library? Well... from what im seeing, from your library, you should realy, realy play...
You should play Back to the Future by Tell Tale Games, everyone loves that franchise, cant believe you havent played it, its a neat little adventure game for a sublte little evening, a TTG classic.

Bioshock 2 could be awesome fun, you havent played that.

Many love Bully SchollarShip Edition and unbelievably enough, you havent played it, its great, great fun with lots to do in it, a awesome, best fun bully expierience.

You have unplayed Dark Souls, the first game if you ever want a hard challenge, thats a good game to play.

You have never played your Dead Rising games D: !? Oh my god... you have got to play those absolutely! So many zombies, so many weapons, many people to save, bunch of pyschopaths (bosses) to beat, a great story and much else, its a ton of fun and excitment man, i realy suggest you play those or even watch a walktrough of the first Dead Rising on youtube to know whats and why its going on in DR2.

Dishonored is an amazing game filled with action and a dark gritty world with some cringy facts (poor whales...), the stealth element is awesome and your arsenal, also awesome, fighting enemies is fun and the story is quite a trip...

Looks like you havent played Dont Starve Toghether, dont have any friends? Could be a sort of fun expierience.

Game of Thrones by Tell Tale Games, A MUST PLAY FOR REAL. The dramatic story, the story of charatchers, the horrors of lost people and iniment dangers coming for them, the intense choice making moments and dialogue choosing, this game is a treasure, youre lucky to have it and should play it, even if you havent seen the tv show, you will have a great time, i did by just watching.

Okay now this is a horrible, horrible sight... youve never played GTA III, GTA Vice City, GTA San Andreas but you have them... play them, realy, play them you have to, their fenomenal games, legendary, famous as hell and support lots of wicked mods and even fan made multiplayer games still inhabited by players.

Looks like you still have to play the two episodes of Half Life 2, i hope i dont have to tell you how baddly you must get at them and play them, its Half Life after all.

Jurrasic Park The Game, also a Tell Tale Game, didnt seem that great but thats cause its old but if you like some story and dinosaurs, and the movies, you could find a late date to play this.

Lone Survivor, The Directors Cut is a must play because its a lovely, brillant, 1 man made, awesome horror game with excelent sounds, music, mystery, messed up stuff, great scary enviroments, unordinary monsters, survival managment, level progression, its a great, great game and you must play it, at nights with headphones ofcourse, a big tip though, when you start this, dont stop playing or you will forgot the way you traveled and/or must travel, it can get confusing if you take a long enough brake so play every day if you can, very often till you finish it, its a great game.

Poker Night 2 is a very much great game to play, even if you are not into poker (like me) its worth playing it for stuff but for the most part, to listen and watch the opponents you play against, their great characthers, game and cartoon heroes that have superb conversations, its awesome being in their presence and having them play against eachother and you, the silent player.

You got an unplayed Prototpe 2, altough i hate the game for its cruelty and violence and overpowerdness of characthers and messed up monsters and such, you will probably have a ton of fun with this since you can destroy and murder so, so much, has a good story and impactfull characthers and moments, its a pretty great game despite the, you know, violent killing. Whenever i watched people consumed and then we see their memories, i feel bad.. and then i dont when it shows how evil they were.. also feeling bad for the hundreds of troops shooting at you with useless guns... poor guys....

You got Sega Genesis Classics i see, you have got to play some awesome old games but i dont know which ones you have but if you can get Access to all the games or so, i can suggest a bunch of great Sega Genesis games.

You got a bunch of Sonic games, i think those are pretty much very worth it to play trough, good levels and good music await you.

Havent played the Strong Bad game but neither have i seen it, isnt he supposed to be a funny guy? Could take a look to see if its worth to play.

Oh my gosh, you got Tales From the Borderlands, play it, play it and prepapre to laugh, chuckle, be amused and excited and thrilled when you play this lovely piece of freaking greatness, a huge suggestion to play this now! Esspecialy with episode 3 just released.

You havent played the first Torchlight, ironicly enough, people seem to love Torchlight games, i guess it will be there if you ever wanna give it a chance.

You have and should play Worms Reloaded, thats awesome that you have it, a super nice game, Worms is a super great franchise.

And the last game you have and should totaly play is Worms Ultimate Mayhem and i think its better than Reloaded, far, far more better, you should realy, realy play it, its fun and will challange your skills, also has active multiplayer, superb fun to be had there my good man.

Okay, there, you should get busy with all of these wonderfull titles you have, theres also a ton of great free to play games to play like Warframe, Battlefield Heroes, Crimecraft, Tactical Intervention, Loadout, Path of Exile, Counter Strike Nexon Zombies, OpenRA, Need for Speed World, ZMR, APB Reloaded and much, much more out there.

If you want recommended games to buy, check out my own wishlist and what i own, i wishlist only ( or mostly) the best games you could ever play ( and have avaivable, i want The Last of Us on PC!!!) As for what to play first... check out the options and figure out what to play out of your feelings or wants.

Lastly apreciate the giveaway man, good luck on the game playing thing, you realy got alot of catching up to do :)

I can recommend Adventure Capitalist, it's a fun game free game and doesn't require much time ( you can ofcourse put lots of time in it :p)

Try finishing BioShock, it's worth it. You can also try Final Fantasy VII if you're not interested in the upcoming remake.