ZenRO is an online game server presenting a modern pre-renewal version 1.0 of Ragnarok Online. Its official website serves as a hub for players to register accounts, download the game, read gameplay guides, and explore information on servers, guild wars, items, monsters, and world maps. It also directs the community to social and marketplace groups, a Facebook page, account login, and donation options.

The server supports a range of progression and customization systems, including equipment refining, costume enhancements, character bonuses, ranking, card recycling, and item crafting. Players can take part in guild wars, Battle Royale, MVP challenges, and scheduled activities, with events offering rewards and opportunities to compete or develop their characters. The site regularly publishes patch notes, weekly updates, promotions, and event announcements. Additional features include a free AI auto system for up to six hours per day to assist with leveling and item farming, plus login rewards, referral benefits, and special limited-time items. ZenRO combines game access, player resources, community features, and ongoing events in one destination.