sega genesis sonic the hedgehog 2. A 2p walkthrough longplay including all 7 chaos emeralds briefly turning into Super sonic tool assisted. Although I do leave it abit late to start collecting them.
Technically I could've left it later by not getting the first emerald in act 2 of Metropolis zone. It's only possible to collect 4 emeralds in act 3 Metropolis as the level closes in and stops you from going back to collect rings,despite there being 6 star posts you can't collect 6 emeralds.
So 4 x emeralds in Metropolis act 3 and 3 x emeralds in Wing fortress zone is the latest you can leave it to get all emeralds.
0:00 Emerald hill zone
3:59 Chemical plant zone
8:32 Aquatic ruin zone
10:58 Casino night zone
16:13 Hill top zone
20:57 Mystic cave zone
24:37 Oil ocean zone
29:48 Metropolis zone act 1
32:30 Metropolis zone act 2
37:24 Metropolis zone act 3
51:17 Sky chase zone
53:26 Wing fortress zone
57:07 Death by TV.
57:17 Wing fortress zone
1:02:46 Death egg zone
1:03:47 Ending & credits