Discover the best offline strategy games for deep thinking in 2025, including Mahjong Titan, Choice of Games, Solitaire Super Pack, Hexa - Jigsaw Puzzles, RTS Siege Up! - Medieval War, Escape game : 50 rooms 1, Nonograms Katana, Microsoft Solitaire Collection, Chess & Checkers, and Puzzle King. Enjoy challenging puzzles and strategic gameplay anytime, anywhere, without an internet connection.