I made it through all of Mass Effect 2 without realising I had the Krogan on my ship frozen. The suicide mission did not go well.

I played Just shapes and beats without knowing how to activate the boost thingy. After failing the tutorial and playing the party mode, I saw that the other people did the boost and I just searched and felt pretty dumb after realizing you can boost.

There's this game called Arc Rise Fantasia for the Wii that's mechanically interesting with the worst English dub known to the English. I got far enough to where something happens to half the party and they're no longer usable. I had really only been leveling those characters and soft locked myself into a really hard boss fight. I was praying for a force-lose boss but all I got was the game over screen.

Played destiny 2 for a quite a bit without knowing about seasonal artifacts including anti-champion ones

Recently played through entirety of the dragon age games on Gamepass. Was pretty excited to finally do this as it had been on my 'list of games to play' for years...

Rushed through and I think I missed a companion in at least two of the games. Maybe all three. Couldn't tell you who offhand, bit was pretty upset when I read about them later and they seemed cool.

Got about halfway through Mass Effect 2 on the PS3 before I realised it's never spent any skill points in upgrades.