- navigate a collection of randomly generated 2D maps
- pause the combat system to think about your next move
- often don't know what's around the next corner
- balance decisions about what items/upgrades to buy in shops using a few common resources you pick up from battles and exploration
- when you die, your game ends
I'm an absolute purist, to be honest it's just pedantry and not really worth debating, I love FTL, and the entire "roguelike" genre, whether they adhere to my standards or not. The golden age of games is really upon us
Usually any game that has procedural elements & permadeath now becomes labelled "roguelike" or "roguelite" by the community, depending.
I'm still a snob about it, to me roguelikes are nethack, ADOM, even newer games like Cogmind and Caves of Qud are roguelikes, but to me, FTL is not.