Can I trade a Steam game that I don't want?

On Steam, you have a Library and an Inventory. Your Library is the list of games you own and can play, but can't trade; your Inventory is the list of games you can trade but can't play.

If you want to play a game in your Inventory, you can add it to your Library, but games can't move in the other direction - once a game is in your Library, it's there forever and can never be traded.

You can view your inventory by going to Steam --> (Your Name) --> Inventory.
To add a game from your inventory to your library, click on it, then choose "Add to my Game Library" on the right.

..and I opened [the gift] it to see what was in it.

There is no such concept as "opening" a Steam gift. When you receive a gift, Steam tells you immediately what game you were sent, then gives you three options:

• Add game to my Library. (This lets you play the game, but not trade it)
• Add game to my Inventory. Steam removed this option in 2019
• Decline (Returns the game to the gifter)

---

Can I have an opened copy of game X, but still receive additional copies of game X

Assuming you mean "If I have a game in my Library, can I also purchase/receive a second copy and put it in my Inventory?" the answer is yes, there are no restrictions on the games you can have in your Inventory.

If someone gifted you it and you've played is less than 2 hours and you've had it for less then 14 days it can be refunded but only under those circumstances. I got his of the steam help page