If a game doesn't have anything that needs to be done to be "completed", then should I mark my completion of it as Completionated?

Password-based GBA games don't seem to have much in the way of collectibles, so beating the game is effectively the same as getting 100%.

That's the way I interpret it! When there's no extras to get other than just finishing the game, then I mark it as completionated because it's technically 100%.

Fair enough! I saw someone else count collecting the Scooby Snacks in Scooby-Doo 2 for GBA as part of their 100%, but there's no visual indicator that you've done so beyond the given level, no way to replay levels beyond using a password to revert your game, and the proof you collected them all in a level (an extra life) can be lost! Even still, you have a max number of extra lives that's lower than the level count.

I'd argue that beating that game also renders it Completionated, but I could be wrong.

Well the fun part is you decide how "completed" your run is for yourself.

For me:
Speedrun -> Actual speedrun or rushing through story without bothering to to do anything else. (No Sidequest, Collectables etc)
Core+Few -> Played the story but did some side content.
Core +lots -> Played the story and completed some side content.
Completionated -> Did all, saw all, all achievements etc. Basically the game has nothing to offer anymore.

Everybody does it differently though. sometimes because of this, the completion time on the community tab is shorter for Core+Lots than Core+Few. :D

I use to be a lot stricter in how I “Completionated” things, but now I’m a bit looser with myself, especially when a game has no visual indication or storage of collectibles like that. Additionally I’ve been more creative with “beating” or “completing” arcades titles recently like Flicky and the expanded Blue Spheres. Do I need to play through every level variation of the latter to say I personally completed it? Probably not, since there’s no real end I. Games like that, so I qualify it as such. As was said before me, all about how you personally quantify some of that stuff (I guess where it makes sense, completionating a Grand Theft Auto game in 10 minutes might raise some questions!)

Understood! Thanks for the input; it's nice to see the varied responses, I was a little worried I was committing some sin by marking a game completionated without collecting every little pickup.

The only thing I typically exclude when I mark a game as 'Completionated' is harder difficulty runs....unless of course there is content in the higher difficulty that can only be accessed that way. If the game is the exact same no matter the difficulty (except, of course, the difficulty), then I still mark it completionated.

Yeah, I feel like I'll be the same way; if I don't need to play on a higher difficulty to get everything, I probably won't.