This is an awesome bargain if you are interested in tactical combat but own none of the games (probably only people new to PC gaming are in this situation). XCom 1 Enemy Unknown, XCom 2 and Chimera Squad + all DLCs. Instant Gaming has no surcharge on a Credit Card payment but a small surcharge on Paypal (12 US cents in this case). Far less unexpected fees than Kinguin and other grey market retailers.
Steam link: https://store.steampowered.com/bundle/20109/XCOM_Ultimate_Co…
The XCommie 2 base game is also really cheap at multiple places, like 95% off. $3.87 AUD from Greenman: https://www.greenmangaming.com/games/xcom-2/; $2.19 USD from CDKeys: https://www.cdkeys.com/xcom-2-pc-ww-cd-key?__currency=USD
However, people recommend playing it with the War of the Chosen DLC.
Update: If anyone missed out, you can still get it for under $7 USD from several grey market retailers. Look here at the offer (it included coupon codes): https://gg.deals/pack/xcom-ultimate-collection/
Great deal! I'll probably never getting around to playing them, already have one xcom on my phone and not played it at all, but that's just me.