Old School RuneScape has 24 skills split across four categories: combat (Attack, Strength, Defence, Hitpoints, Ranged, Magic, Prayer), gathering (Fishing, Mining, Woodcutting, Farming, Hunter), production (Cooking, Crafting, Fletching, Herblore, Runecraft, Smithing), and utility (Agility, Construction, Firemaking, Slayer, Thieving, Sailing). Each skill caps at level 99, and the total level cap across all skills sits at 2,277.
The catch is the XP curve. Experience requirements in OSRS grow exponentially, roughly doubling every seven levels. Reaching level 92 in any skill means you're only halfway to 99 in terms of total experience needed. That makes the final stretch of any skill significantly longer than everything before it combined, and it's why individual skills can take dozens or even hundreds of hours to max depending on the training method.
Skills also feed into each other in ways that multiply the time commitment. Herblore requires herbs from Farming and secondary ingredients from various sources. Construction demands planks processed from logs. Prayer training relies on bones or ensouled heads gathered through combat. Unlocking the best training methods for one skill often requires progress in several others first, plus quest completions that have their own prerequisites.
For players chasing a max cape, the scope is enormous. Every skill to 99, every interconnected requirement met, every costly buyable skill funded. An OSRS skill boost handles the parts of that journey where the training method is straightforward but the hours are extreme: Agility laps, Runecrafting runs, Mining rocks, or the repetitive click patterns that define many skills at higher levels.
The difference between level 70 and level 99 in most skills isn't about complexity. It's pure time. An OSRS skill boost from Boosting Ground compresses that time investment so you can focus on the content those levels actually unlock.