The Nintendo Switch Online service offers many free games to its players, often once a month. These titles are usually NES, giving players a retro throwback to the old days of gaming. The new NES titles coming to the service on August 21st promise to be good, as one of them is quite rare; it’s never officially been re-released prior to now.

The free NES titles coming this month are is the cooperative, beat ‘em up game Kung Fu Heroes. The more notable member of the pair is Vice: Project Doom. This action game hasn’t been re-released since its initial debut on the NES in 1991. That means this Nintendo Switch release is the first official port of the game in almost three decades.

As said previously, both of these titles will be available on August 21st, raising the total count of NES games available with Nintendo Switch Online to 48. Nintendo has been adding a few classic titles from the NES to Nintendo Switch every month: July brought Wrecking Crew and Donkey Kong 3, and June included City Connection and Double Dragon II.

The NES library may be free in a sense, but you do need a Nintendo Switch Online subscription to access it, and that is, naturally, not free. Subscription prices are US $4 / £3.49 / AU $6 for one month, US $8 / £7 / AU $12 for three months, and US $20 / £18 / AU $30 for one year. There is also the annual Family Membership, which costs US $35 / £31.49 / AU $55, but is actually the most cost effective for many people, as it covers eight accounts over multiple Switch systems.

Free NES games aren’t the only perk of a subscription though. Switch Online subscribers also get a free game in the form of Super Smash Bros. Ultimate, and there is currently also a free trial period running for Mario Tennis Aces, though that is only available at no charge until the 13th. However, it’ll also be on sale at the eshop until August 20th, and any progress that you make during the free trial can be carried over to the bought game.

That said, while there are many games in the NES library available to play, and that library will most definitely continue to grow, you’ll have to maintain access to the service through subscription to take advantage of them indefinitely. Even so, if you play the Switch a lot already, that’s not a lot of extra money for a lot of extra benefits.