Level System Plugin — Cs 1.6

new szAuth[35], szData[128] get_user_authid(id, szAuth, 34) format(szData, 127, "%d %d %d %d", g_iLevel[id], g_iXP[id], g_iKills[id], g_iDeaths[id]) nvault_set(g_iVault, szAuth, szData)

// Speed bonus set_user_maxspeed(id, 240.0 * SPEED_BONUS[lvl]) cs 1.6 level system plugin

RPG-Style Leveling: Includes skill trees where players can spend "Skill Points" on attributes like damage or health regeneration. "%d %d %d %d"

// Full HP on level up set_user_health(id, 100) cs_set_user_armor(id, 0, CS_ARMOR_NONE) szData) // Speed bonus set_user_maxspeed(id

If you are an admin, you don't need to code from scratch. These established plugins have been battle-tested for years: