> a valuable skill
I am really laughing at this one. You got me good. This is either some kind of farming game where I need to "unlock" a valuable skill... ("training" makes me think of NES Super Marios Brothers 3 with the slot machine game after each level), or a skill that I need to add to my LinkedIn profile to check if anyone is reading it. (I recall years ago two guys adding recommendations to each other's profiles with very funny and implausible notes to see if anyone was looking. Does anyone remember that?)I used to endorse people for "spiritual warfare". Sadly they removed this feature, and now my friends can't show off their skills.
> NES Super Marios Brothers 3 with the slot machine game after each level
a) It's either Super Mario Brothers or Super Marios Brother
b) SMB2 (aka Super Mario USA in Japan) has the Bonus Chance slot machine after each level, SMB3 does have the Goal card at the end of each level with a match 3 mechanic, but I don't consider that to really be a slot machine.