Nintendo always adds in some surprise NES games with their monthly updates to the Switch Online NES collection. We knew that Super Mario Bros. 2 and Kirby's Adventure were coming today, but now we know that both Blaster Master SP and Metroid SP 2 are joining them.
Blaster Master SP
Start from area 8. You’ll start from area 8, the final area, in this special version of Blaster Master. Moreover, SOPHIA is fully equipped and ready for action! The Hover Gauge and Power are full, and Homing Missiles, Thunder Break, and Multi Warhead Missiles are all maxed out – along with Jason’s own Gun Energy Gauge and Power! You’re ready to take on the Underworld Lord… so get to it!
Metroid SP 2
The fully fortified bounty hunter! You just got a great head start on your mission to defeat Mother Brain! In this version of Metroid, every power-up, including all Power Suit weapons and abilities, is available from the start. The ending of this game changes slightly depending on how fast it’s beaten, boasting a total of five endings. Here, you’re ready to rush right to the finale, where you can see the ending that features Samus without her trademark Power Suit.
Thanks to Sligeach_eire for the heads up!