UEBS is a more realistic-y battle sim. Unit editor is fun, although limited to just changing stats. Steam Workshop stuff is better, but also more of the same. Good on a sale, but it can be very wacky.

TABG is a unique Battle Royale game with lots of customization options and some crazy weapons. It also has a very unique second-chance system. A game best suited for friends. If it isn't too dead.

TABS is a good battle simulator. It has over 100 units to deploy, custom creators for your own factions and campaigns, and its own in-game Workshop for sharing. Definitely worth getting on a sale.