awesome work!

Update v0.2 - Added copy unowned/unknown games to clipboard function

Not bad.

A must-have feature is saving all owned games in local short-lived cache to avoid asking SteamCommunity for data on each page refresh. You should compare last cache refresh and if it gets older than e.g. 1-2 hours, schedule a refresh.

If you need code samples, you can find some in API calls to my touhou website: https://touhou.justarchi.net/js/userscripts/2hu.user.js

Great Work! But lists with hundrets of games make my chrome freaze. Would be cool if it could work in background without freezing anything :)

Suggested feature: manually add games to owned list for those who have more than one account (but you can only use one here).

Wow, wow, wow! This one actually a very good thing! As OP already said, Compare2Steam have totally bad performance, when I trying to check a big libraries, its will use all of my RAM! And, of course, my PC stopping worked >.< So many thanks to Royalgamer06 for userscript ^_^

i have 3k+ games on steam and, well, this is crashing tampermonkey

You're a true champion. Thanks for this.

First impression is.. decent. I'm supposedly part of your target audience with over 5000 games in my library and a trade list of over 2000 games. When loading my own list (https://www.steamgifts.com/trade/1xXqs/h-over-2000-games-w-games-i-dont-already-own) it takes a fair minute to fully load. This isn't strange and I actually expected it to take even longer.

Now my two cents:

Perhaps consider a single character margin of error, of the 2000 games listed about 250 of them trigger a false positive. After inspecting these, it seems 90% of these false positive have a special character in the title. :, !, &, -, ~, +, ., `, ® and possibly (though uncertain) all numbers.

Also subs aren't taken into account, meaning all packages of multiple games aren't recognised. Not a huge deal but perhaps something to look into one day.

And just a personal preference: I'd like to see every game at least start with a capital, full lower case always makes me cringe a little.

But it's a very nice start, I hope you can improve it even further.

Might be a strange request, but could there be a way of checking owned games against the Steamgifts bundle list? - https://www.steamgifts.com/bundle-games

Why do I want this? About to start trading, and as a bit of games collector I want to hoover up as many bundle games I've missed as possible. First of all I need to identify them/create a comprehensive want list. I think I'd prefer to do a search on the trades section for game titles I don't have rather than click on random trade threads until I see something I haven't got yet.

Did attempt to use compare2steam for this list creation recently after putting together a raw list of game titles only for every game on the bundles list but my library kept crashing it. It seemed to work if I loaded a couple of hundred titles at a time to check but I found that very time consuming and didn't bother in the end.

probably will use this script :D. And will get even better with your upgrades (since you look a guy that wants to improve his script)

Good luck, good job and thx a lot ^_^

Wow!
Awesome. Good work!

nice feature!

Well done! I do want to clarify one point:

How can it be so fast?
I am actually ignoring Steam AppID's altogether and only check with game names.
Yes, that may cause some inaccuracy, but I don't think that much.

Specifically, it'll be any games pulled and put back on the market. This will probably only include some games that are 0p.

If you check the name, do you just check a part of the name or the whole name?

Update V0.3

• Now remembers owned steam games and only checks again per set interval
• Filtering now requires user action first

great script, thanks for that. :)

but maybe you should switch to phonetic similarity or something like that for comparison. right now, small things like a missing dot are already enough to let it fail.

example:

mx vs atv reflex => your script says i don't own it, because the actual title is "MX vs. ATV Reflex" with a '.'.

EDIT: simple SG formatting seems to confuse the script, though:

View attached image.

Nice! I might actually start trading for bundled/smaller games again on SG thanks to this.

Huge update released!
V1.0 now, because I feel this version is stable and solid.
Besides it offers many features and is fully configurable.
Changelog:

Version 1.0

• Many improvements to the code
• Made it compatible with the new SteamTrades
• Added an option to search in SteamDB instead of Steam Store
• Finally fixed everything turning lowercase
• Renamed it slightly (SteamGifts Trades --> SteamTrades)
• Other changes I don't remember

Why haven't I seen this earlier? I always used NerdChan's Steam Comparison because it's way faster and more stable than Compare2Steam. This script seems useful, time to install it.

awesome script very helpful.
Do you think its also possible to show games that are in the wishlist ?

Doesn't seem to work with GreaseMonkey, even though it installs fine.

Version 1.1

• Added support for wishlist
• Now ignores everything after "="
• Now also ignores everything between [ and ]

Great Work!

Thank you