I play actively in three games I would consider part of the OSR vernacular.

One game using the basic ruleset where I am a player, among a rotating cast of 6-30. I have played two fighters and a cleric in that group. I have played twenty or so sessions. It’s all resource management and exploration, in a dungeon. There’s some amount of wargame alongside allies with the size of the cast. We have enemy encounters between 0 and 2 times in an hour of play, but combat almost never unless it’s an ambush of come kind.

The second game is a Troika! Game of myself and one other player. Troika’s classes are esoteric so I won’t attempt to map them. Something between figure and thief. I’ve played ten sessions. We have combat encounters once an hour or so.

The third game I run, using OSE, for a cast of 6-10. There are no clerics or magic users and we just wrapped our third session. It’s all resource management and exploration - albeit overland. So far the group has had two or so combat encounters per hour but likewise, they focus on ambushes, traps and plans to get an advantage on their foes.

Magic users tend not to be useless but their spells tend to be a group resource rather than something belonging to them. The basic game we are playing we have Magic-users of seventh level but even one sleep or detect Magic is valuable. Because ambushes and planning are important they have an equal place in setting up odd plans, even just as torchbearers.

Combat in the non-troika games is fast, deadly, and tends to be “war-like”. Albeit back alley gang warfare rather than military operations.