Alex Williamson is a one man wargame factory
Over the past decade the proprietor of Asymgames.com has crafted around seventy computer wargames. All are free, equipped with competent AIs, and playable online, and many explore the kind of relatively obscure conflicts, ops, battles, and historical events that bigger devs often ignore. Assuming you can live with utilitarian graphics, and are willing to learn the ins and outs of Alex’s various self-built engines (there are eight families of games), his Aladdin’s archive is well worth a visit.