Amazon has tomb raider for 39.99 for xbox one and ps4 as their gold box deal.
		
		
	 
This is off-topic because it's not championing my console of choice or bashing my console of dis-choice, but I have to chime in here and say that Tomb Raider never clicked with me the way it did with other people.  I played it on PS3 and it was strictly a one-and-done game.  I have basically no interest whatsoever in a cross-gen version, 
so I can wait until the inevitable PS+ release.
		 
		
	 
This, if you can wait Tomb raider is a top candidate for a later freebie on plus. Any recent Xbox converts who are not familiar with PSPLUS playing the guessing game as to what you can get free in a few months is a very useful skill.
If a game is boderline buy for you here are some key points to deciding to purchase.
Here are the high points from the article on what games are most likely to be yours for free in a few months:
1. Sony first party = since they own the titles are the easiest to give away later.
2. Titles that have a big sequel coming up = the free prior version gets the masses pumped up for the new version
3. Prior PS Plus partnerships
4. Ability to monetize add ons when the game is given away free
As it stands now the 5 most likely current games that will be free on plus withing a year are: (in descending order)
1. Knack (Sony title with sequel on the way)
2. Killzone (Sony title)
3. Doki Doki Universe (Sony monetize)
4. Tomb Raider ( Square Enix partnership)
5. Injustice Gods Among Us (WB past contributions)
This is why I passed on Killzone, to me that is a sure fire PSPlus game down the road
Here is an article on it
http://five-games-hit-ps-plus-ps4-year