Games like Ironseed 3 : Vigil
Games like Ironseed 3 : Vigil include Starfield, Total War: WARHAMMER, Elite Dangerous, Star Trek: Voyager - Across the Unknown, and X4: Foundations. We matched them by the tags players give Ironseed 3 : Vigil on Steam (RPG, Exploration, Strategy, Tactical RPG, and Space Sim): closest matches first, and among equally close ones the better-known games.
Starfield
Shared: RPG · Exploration · Space
Total War: WARHAMMER
Shared: RPG · Strategy · Strategy RPG
Elite Dangerous
Shared: Exploration · Space Sim · Space
Star Trek: Voyager - Across the Unknown
Shared: Strategy · Space Sim · Exploration
X4: Foundations
Shared: Exploration · Space Sim · Strategy
Stellaris
Shared: Strategy · Exploration · Space
The Banner Saga
Shared: Tactical RPG · RPG · Strategy
SpellForce: Conquest of Eo
Shared: RPG · Strategy · Tactical RPG
Heroes' Vow: Three Kingdoms
Shared: RPG · Strategy · Strategy RPG
EVE Online
Shared: Exploration · Space Sim · RPG
Symphony of War: The Nephilim Saga
Shared: RPG · Tactical RPG · Strategy RPG
DARK SOULS™ III
Shared: RPG · Exploration · Lore-Rich
Starminer
Shared: Space Sim · RPG · Exploration
Gothic 1 Remake
Shared: RPG · Exploration · 3D
BOOK OF HOURS
Shared: RPG · Exploration · Strategy
Starpoint Gemini Warlords
Shared: RPG · Strategy · Space Sim
Warhammer 40,000: Rogue Trader
Shared: RPG · Strategy · Tactical RPG
Starcom: Unknown Space
Shared: Exploration · Space Sim · RPG
Between the Stars
Shared: RPG · Strategy · Space Sim
SpaceBourne 2
Shared: RPG · Space Sim · 3D
Lightracer Spark
Shared: RPG · Space Sim · Strategy
Cyberpunk 2077
Shared: RPG · Exploration · Sci-fi
Jagged Alliance 3
Shared: Strategy · RPG · Tactical RPG
Fallout 4
Shared: Exploration · RPG · Atmospheric