OpenTTD - An open-source clone of the classic game ...
Mighty Monsters - Mighty Monsters offers a fantastic combination of Adventure-based Puzzles and RPG elements and takes you to a wonderfully colorful world filled with a number of different monsters and creatures.
Transport Fever - Transport Fever is an Adventure-based, Management, Strategy, Economy, Sandbox, City-Building and Single-player video game developed by Urban Games and published by Gambitious Digital Entertainment.
Monster Galaxy: The Zodiac Islands - Monster Galaxy: The Zodiac Islands is enticing new Adventure, Puzzle and RPG video game by the popular Gaia Interactive Inc.
Railroad Tycoon - Railroad Tycoon is a very first installment in the series of Railroad Tycoon that was released in 1990 developed by MPS Labs and published by MicroProse.
Geo Society - Geo Society by Ben Hill is a great 2D Adventure-based Puzzle and RPG video game that offers beautiful old school visuals and allows you to enjoy a totally different type of Monster Hunting and Capturing video game experience.