Metal X Slug as I said is a game that is here solely because not only I played it A LOT but also still enjoying to play it to date, I have it on my Steam account and can play regularly when bored. It take maybe 60 minutes to beat so it's an easy pick to beat while travelling with my laptop. It's not a huge game and it's here more as a franchise representative than anything, that's why I'm putting it only a 50. Make it nonetheless
Pikmin 3 is just adorable. I tried the demo and after a few hours I just bought the physical version. It's not a huge or ambitious title but it's fairly original, I can't recall playing anything like it before. I hope the next games are a bit bigger in scope because the only downside of Pikmin 3 is to be too short, the fun ends when you aren't even expecting!
SM64 suffers from all early 3D problems I've already mentioned, if the camera had a more fixed perspective (like let's say Crash Bandicoot which some times feel like a 2D game) this could be placed better, but nowadays the game just does not have a smooth experience to make it higher in the list. Great thing it was the roots for even better 3D games that came next.
I think my grip with Awakening is that now I'm experienced enough with game to understand how to completely break it with pairing systems which makes the whole experience less fulfilling. The story of this entry isn't exactly brilliant, but serves its purpose and I like how they integrate the support mechanic into actual meaningful narrative. T
SoulSilver is my pick as the definitive Pokemon game. It features 2 regions (including the arguably most iconic region) and a huge post game with a lot of legendaries, a Battle Frontier, secret regions to unlock and so on. By that time the game still had a drop of difficulty and wasn't just mindless clicking in your strongest move because you are far too over-leveled to have any challenge. It also have a very nice and lovely addiction of Pokemons following you that has removed for whatever reason.