Games like Boat Train
Games like Boat Train include FTL: Faster Than Light, The Last Spell, XCOM 2, Jagged Alliance 3, and Lost Eidolons: Veil of the Witch. We matched them by the tags players give Boat Train on Steam (Strategy, Roguelike, Tactical RPG, Turn-Based Tactics, and 2D): closest matches first, and among equally close ones the better-known games.

FTL: Faster Than Light
Shared: Roguelike · Strategy · Top-Down

The Last Spell
Shared: Strategy · Turn-Based Tactics · Tactical RPG

XCOM 2
Shared: Strategy · Turn-Based Tactics · Tactical

Jagged Alliance 3
Shared: Strategy · Turn-Based Tactics · Tactical RPG

Lost Eidolons: Veil of the Witch
Shared: Turn-Based Tactics · Tactical RPG · Roguelike

Chroma Squad
Shared: Strategy · Tactical RPG · Turn-Based Tactics

Inkbound
Shared: Tactical RPG · Turn-Based Tactics · Roguelike

Stoneshard
Shared: Roguelike · Strategy · 2D

Slay the Spire 2
Shared: Roguelike · Strategy · 2D

Legends of Kingdom Rush
Shared: Tactical RPG · Turn-Based Tactics · Roguelike

Into the Breach
Shared: Strategy · Turn-Based Tactics · Roguelike

Warriors of the Nile
Shared: Strategy · Roguelike · Turn-Based Tactics

XCOM®: Chimera Squad
Shared: Strategy · Turn-Based Tactics · Tactical RPG

Cobalt Core
Shared: Strategy · Roguelike · Turn-Based Tactics

STAR WARS Zero Company™
Shared: Turn-Based Tactics · Strategy · Tactical

Reverse Collapse: Code Name Bakery
Shared: Turn-Based Tactics · Tactical RPG · Strategy

Invisible, Inc.
Shared: Turn-Based Tactics · Strategy · Tactical RPG

The Dungeon Beneath
Shared: Turn-Based Tactics · Tactical RPG · Roguelike

MASSIVE CHALICE
Shared: Strategy · Turn-Based Tactics · Tactical RPG

Battle Brothers
Shared: Strategy · Turn-Based Tactics · Tactical

Tinyfolks
Shared: Tactical RPG · Turn-Based Tactics · Strategy

TRIANGLE STRATEGY
Shared: Turn-Based Tactics · Strategy · 2D

LONESTAR
Shared: Strategy · Roguelike · Turn-Based Tactics

Kingdom Rush - Tower Defense
Shared: Strategy · 2D · Tactical