Looking for a free offline TCG.

Reserved.

Dueling Network is probably the #1 site for playing Yugioh online

YGOPro for offline and online YuGiOh. In offline you can play against bots (not the brightest AI...) and do puzzle mode.

Online allows you to play others in lobby or random matchmaking.

The download is quite large because it includes artwork for thousands of cards. You can choose from any released card to build your deck (as long as it complies with the current banlist), so it's completely free.

search for a PS1 emulator and play Yu-Gi-Oh! Forbidden Memories, its a awesome game!

http://store.steampowered.com/app/316010/
http://store.steampowered.com/app/256410/

if you can spend a bit of cash or trade, panoptes is pretty good, still in EA though http://store.steampowered.com/app/421910/

Maan, seeing someone mention YuGiOh makes me want to play...
Must...resist..

Only Yu-Gi-Oh: Power of Chaos (no emu), and Yu-Gi-Oh! 5D's World Championship 2011: Over the Nexus (needs DS Emu) come to my mind, but they are fairly good games.

BoardGameArena A few card games there, I highly recommend Race for the Galaxy.

Card City Nights!

Game adaptions of Netrunners / Yugioh / Magic:TG / LoTR played via OCTGN / TableTopSim / possibly VASSAL / possibly Tabletopia

You can specifcally look for LCG (Living Card Games) which consist of fixed Core Sets and Expansions (you don't buy boosters but known Addons - e.g. you know its content before) if you're looking for IRL card games. For instance the Lord of the Rings cardgame or Magewars.

Hope those primers help you mate... btw add me on Steam if you plan to do a game or two here and then in MP.

Spellweaver is awesome, you can get everything by just playing and the grinding is not too heavy, if you don't have much time to play you can just login and do the daily quests (the rewards are very good)

Pokemon Trading Card Game is free and you can redeem the codes from any IRL deck or booster to import it to the game, too. You need to be online to play it, but it doesn't have to be against other players, you can battle bots, too (still online).

Yu-Gi-Oh! Power of Chaos is for PC, I think it's the only YGO PC game. If you have a PS2 Emulator, you could get Yu-Gi-Oh! GX Tag Force too.

The last Yu Gi Oh Arc-V for psp is pretty good and has plenty of cards, there's also an english patch.

Yu-Gi-Oh! Power Of Chaos, Man I played the ****out of that game back in the day. That one is offline & you have multiple versions of the game. But it's not free unless you want to set sail, Argh!

Faeria is a nice card game too, it's a mix of Heartstone with settlers of Cathan very nice & free on steam. But you have to log in the server.

I think that older Magic Duel of Plainswalkers can be played offline against AI ofc.
You can try HEX: Shard of Fate for free (it's coming to Steam in 2 days)

SolForge