Original progression
Old School foundations meet custom zones, upgrade paths, achievements, gear, and rewarding account progression designed for Catalyst.
CUSTOM OLD SCHOOL RSPS
Old school.Reforged.
Catalyst is a custom Old School private server built around familiar combat and skilling—expanded with original bosses, unique gear, fresh zones, custom progression, and constant community events.
100%Free to play
99.9%Server uptime
24/7Active support
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A FAMILIAR GAME, A NEW WORLD
Custom at its core.
Old School combat
The combat rhythm you know, sharpened with custom bosses, competitive events, challenging encounters, and worthwhile loot.
Community driven
A living RSPS economy, frequent updates, active staff, and player feedback that directly shapes the next custom update.
FROM THE CATALYST TEAM
Latest news.
UPDATE◇
Catalyst Update Log 1 - 10/16/2026
Catalyst's first update log with a bunch of QoL and bug fixes.
Read more →ANNOUNCEMENT◇
Catalyst Enters Beta
Read more →ANNOUNCEMENT◇
Welcome to Catalyst
The gates are opening. Discover our vision for a refined old-school adventure.
Read more →YOUR LEGACY STARTS HERE