The official +1 Assassin Leveling description states: play with friends for +10% Strength each. This is the clearest public percentage in the game. It tells you the advertised bonus per friend, but it does not publish a cap, rounding rule, refresh delay, server-distance rule, or stacking order with pets, rebirths, temporary boosts, and paid Strength passes.
Activate the friend bonus
Add the other player as a Roblox friend, then join the same +1 Assassin Leveling server. Confirm that both avatars are actually present in the server rather than merely online in Roblox. Let account data load before comparing gains.
Record your Strength total and click once without the friend present. Have the friend join, wait for any bonus indicator to update, then click once under the same pets, rebirth, passes, and temporary boosts. Repeat several times. The difference shows the live account result more reliably than calculating from the label alone.
If the bonus does not appear, leave and rejoin through the friend’s server once. Check that the relationship is recognized as Friends rather than Followers. Do not share account access or use a private-server link from an untrusted source.
Plan a friend-assisted session
Coordinate a start time and decide which gate everyone wants to reach. Stand at the training target before activating any timed Strength boosts. Keep clicks active while friends remain together, then test the next gate when a meaningful upgrade becomes reachable.
Friends do not replace the rest of progression. You still need levels, daggers, equipment, pets, combat clears, Wins, and rebirth decisions. The bonus is most valuable when it increases a focused training block that feeds those systems.
Solo baseline
Use a friend-free click result to understand your account without the group modifier.
One friend
Compare the same click after one friend joins. The official advertised amount is +10% Strength.
Several friends
Add one player at a time if possible. The public description says “each,” but it does not state the cap or final formula.
Friend leaves
Wait for the interface to refresh and compare again before blaming another boost for lower gains.
Understand the percentage
Ten percent can produce a rounded displayed value, especially when the base click gain is small or other multipliers are active. A +10% label does not guarantee that the visible total increases by a neat decimal on every click. The game may accumulate fractions, round each action, or apply the friend bonus at another stage of the formula.
With several friends, avoid asserting simple addition or multiplication until the live result is measured. “+10% each” supports a per-friend benefit, but not a specific cap or order. Record the number of friends, base gain, final gain, and every other active modifier.
Combine friends with pets and rebirth
Pets are officially advertised as powerful boosts, and rebirth is advertised as making you stronger. Their exact formulas are not public. Establish the friend bonus first with a stable pet loadout, then change one pet. This reveals whether the result behaves as expected without needing to name a hidden stacking formula.
After rebirth, retest the solo click and one-friend click. The rebirth may change the base value on which the friend effect operates. Use the Strength Guide to keep the test controlled and the Rebirth Guide to record the new cycle.
Combine friends with paid passes
The official Store lists Strength products from x2 through x512, but public descriptions are blank. Do not promise that the friend percentage applies before or after those pass multipliers. Test the owned pass result solo, then invite one friend and compare.
If a Store purchase appears missing, check Roblox ownership and rejoin before opening a support request. A friend leaving at the same moment can also make the displayed gain drop, so isolate the variables.
Public servers and private servers
The official description says friends must be playing with you; it does not specify public versus private servers. If private servers are available, compare the bonus with the same friend in each environment. Server type should not be assumed to change the percentage without a live result.
Public servers can contain unrelated players, but ordinary players are not automatically friends. Count only accounts that Roblox recognizes as your friends and that the game’s bonus indicator or click comparison supports.
Troubleshooting
- Confirm both accounts joined the same server instance.
- Wait for the Strength value and player list to finish loading.
- Verify the Roblox friendship status on both accounts.
- Compare several clicks, not one delayed UI update.
- Remove or record temporary boosts before testing.
- Keep the same pets, equipment, dagger, and rebirth state.
- Rejoin once if the bonus fails to refresh after a friend enters or leaves.
- Check whether the Strength counter rounds the displayed gain.
Do not create alternate accounts solely to bypass rules or automate presence. The bonus is a normal social feature, and safe use means real accounts controlled by their owners.
Friend bonus questions
How much does one friend add?
The official description advertises +10% Strength for each friend playing with you.
Is there a maximum number of friends?
No cap is stated publicly. The API reports a maximum server size of 12 in the checked snapshot, but that is not proof that every other slot can contribute or that the bonus has no smaller cap.
Does the bonus affect Wins?
The official wording names Strength, not Wins. Any indirect improvement comes from training faster and clearing fights sooner; a direct Wins multiplier is not established.
Does the bonus remain after a friend leaves?
It should be treated as presence-based because the description says friends playing with you. The exact refresh timing needs a live test; recheck the per-click value after the player leaves.
Evidence note
The +10% per-friend value is Official from the Roblox experience description checked October 9, 2026. Server capacity is official API data. Caps, rounding, refresh timing, private-server behavior, and stacking with other boosts need in-game testing.