I’ve heard that this game called Warhammer 40,000 is pretty popular, but having not played I can’t recommend.
In all seriousness, the only minature sci fi war game I can think of that I’ve played is Cry Havok. I can recommend that as a solid gaming experience, but one I ultimately sold my copy of. I know there have been WH40K boardgames: Space Hulk and Forbidden Star, but I have not played them.
On another note, I played Clank! the other night for the first time. I’ll be honest, I think the name threw me and I was predisposed to not like it based on that. However, the actual game was a combination of deck building, which is still addictive even as I’ve tired of it, and push your luck. You are represented by a meeple on a board with interconnecting rooms. Some cards will give you movement, which you can use to advance deeper into the dungeon. The ultimate goal is to pick up an artifact, of which there are several. However, the deeper into the dungeon an artifact is, the more points it is worth. However, in your deck will be cards that generate “clank,” or noise which will ultimately attract a dragon’s (not pictured). When a dragon attack is triggered by specially marked cards entering the market, those cubes are thrown into a bag and a certain number are randomly drawn out. These become damage. 10 damage and a player is eliminated from play. Either completely escaping the dungeon or dying will trigger the endgame, which is increasingly challenging dragon attacks until after 4 or 5 rounds the game just ends and everyone still in play is knocked out. Hence, a push your luck element. I enjoyed it, but could see the randomness hurting it for some people. Also, I’m concerned a player could play very conservative, grab the nearest artifact, rush the exit to force the end game, but then insure they won’t win and give the game to the slightly more adventurous player.