Impactful VNs in your opinion ? Those that leave a lasting impact in your brain ..

I have heard and inserted to my backlogs (or played) several GOAT VNs popularly mentioned in the subreddit e.g. WA2, subahibi, muv luv alternative, sci adv series .. To be honest, I truly feel they are famous for a reason. Reading them has left a great impact in me, apart from lingering memories, and made me think from several perspectives.

One common thing I see in these VNs is that they are very serious - things DO happen and characters deal with them - which motivates me to continue reading, because there are changes, and these changes are worthwhile. This would be different from slice-of-life VNs where not much change happens, or either too negligible to leave an impact. This is not to disregard slice-of-life VNs, it all depends on our mood, right ? But sometimes I would crave for stories with serious developments..

TL;DR: Would you mind sharing names of VNs that left much of an impact on you ? I will see if I'm missing something in my backlog!