Lazer Grand Arena 2025

The Lazer Grand Arena 2025 (LGA 2025) was an osu!(lazer) tournament hosted by the osu! team. It was the second instalment of the Lazer Grand Arena series.

Tournament schedule

Organisation

The Lazer Grand Arena was run by the osu! team and various community members.

Links

• Information spreadsheet
• Tournament discussion/feedback thread
• Livestream
• Pick'ems page hosted by hallowatcher
• Challonge bracket

Prizes

The Lazer Grand Arena offered badges to the top 3 finalists.

Mappools

Week 2

Download the mappack here (114 MB)
View the showcase VOD here

• No Mod

  1. Falcom Sound Team jdk - GENS D'ARMES (jonathanlfj) [CONQUEROR]
  2. Bal-Sagoth - Shackled To The Trilithon Of Kutulu (Mazzerin) [Ph'nglui mglw'nafh Cthulhu R'lyeh wgah'nagl fhtagn - Original]
  3. Akiyama Uni - Yuuga ni Sakase, Sumizome no Sakura ~ Border of Life (Suicune3) [Extra Stage]
  4. Project-G - Chronokinesia (Xykrome) (Cut Ver.) (nooj) [nooj x feiri Zhonya's Hourglass]
• Hidden

  1. Magdalena Bay - Death & Romance (defiance) [Echo]
  2. Sum 41 - Fat Lip (fieryrage) [don't count on me]
  3. Shogo Nomura - egoist (Megafan, Mysty) [colbab]
• Hard Rock

  1. MikitoP feat. Rib - Tsukiakari (BronyCA) [Moonlight [MRC EDIT]]
  2. Sparxe - Switcheroo (nik) [Trickster (LGA Edit)]
  3. Masayoshi Oishi - L'oN (AirinCat) [Collab Extra]
• Double Time

  1. (1.50x) UPLIFT SPICE - Pandora no Hako (Dada) []]
  2. (1.30x) Hatsune Miku - Mythologia's End (val0108) [Myth0108ia]
  3. (1.35x) ELECTROCUTICA - Dependence Intension (Mirash) [existence discontinuously]
• Lazer Mod

  1. (Depth) callasoiled - Altitude Remix (dectopia) [Outer Space]
• Original

  1. Jouxl Eterna (JinoBeats) - Resonance of Ice Stalactites (netnesanya, kyairie) [Netnekyai's Crystallisation]

Week 1

Download the mappack here (104 MB)
View the showcase VOD here

• No Mod

  1. Nanahoshi Kangengakudan - FREEDMAN (-Links) [Imitadores de la Libertad]
  2. blobdash - ARE WE FLOATING IN SPACE (DeviousPanda) [ODYSSEY]
  3. Sven Noon - S_Unfolding (bob) [|_——|o||—|]
  4. sakuraburst - SELF DESTRUCT (pocket-) [REMOTE]
• Hidden

  1. BUTAOTOME - Ego (_xyliac) [Egoistic Fumo Drip]
  2. Jamie Paige - Machine Love (vetoed) [Real Love]
  3. Will Stetson - Hai Yorokonde (English ver.) (flake) [get it done]
• Hard Rock

  1. Rabbit House - Divine Ordeal (Garden) [Garden & yf's Ultimate Trial]
  2. Glacier - Take a Breath (Tycani) [The Edge]
  3. Limonene - flood warning (Weoweet) [wee woot]
• Double Time

  1. (1.35x) Kikuo - Hole Dwelling (melon boy) [Bottomless]
  2. (1.50x) Demetori - Seijouki no Pierrot ~ The MadPiero Laughs (jonathanlfj) [Lunatic]
  3. (1.20x) Morimori Atsushi - PUPA (Cherry Blossom) [Butterfly]
• Lazer Mod

  1. (Freeze Frame) connsome - flat by second (ktgster) [Expert]
• Original

  1. xeven - Deglaciation (Mysty) [Melt]

Qualifiers

Download the mappack here (114 MB)
View the showcase VOD here

• No Mod

  1. Wagakki Band - Kagerou Days (-Kirigiri) [Heaven]
  2. Aether Realm - Swampwitch (iamtickrate) [Wrath of the Witch]
  3. ZUTOMAYO - TAIDADA (Petal) [RESONATION]
  4. onumi - ZERO-SEVEN (Cappu) [SAVE SATOKO]
• Hidden

  1. Mindless Self Indulgence - Lights Out (Nymphe) [nothing ever happens]
  2. Atos feat. Tachibana Kanon - Byoutou no Negai (Garden) [Wish]
• Hard Rock

  1. Lie and a Chameleon - JOHN DOE (Stompy_) [Surgis x flake's Extreme]
  2. -45 - Millarca (228) [Suffering]
• Double Time (variable speed multiplier)

  1. (1.30x) Shoji Meguro - Kimi no Kioku (Aethral Remix) (Akali) [Remembrance]
  2. (1.30x) Awake - Supernova (Niva) [Extra]
  3. (1.20x) PUP - Mabu (Hobbes2) [Extreme]
• Lazer Mod

  1. (Bubbles + Approach Different) Carpool Tunnel - Afterlight (_Epreus) [Insane]

Match results

Week 2

Wednesday, 21 May 2025:

Thursday, 22 May 2025:

Friday, 23 May 2025:

Saturday, 24 May 2025:

Sunday, 25 May 2025:

Saturday, 31 May 2025:

Week 1

Detailed statistics for this round can be found here.

Saturday, 17 May 2025:

Sunday, 18 May 2025:

Qualifiers

The final standings for the Qualifier stage can be found in the following spreadsheet.
View the Qualifier seed reveal VOD here.

Ruleset

Tournament rules

1. The Lazer Grand Arena is a multi-bracket (single, and later double elimination) tournament, played on osu!(lazer), osu! ruleset.
2. Beatmap scoring is based on the default osu!(lazer) scoring.
3. The mappool for each stage will be announced by the mappool selectors on the official stream at appropriate times.
4. The match schedules for each stage will be announced by the tournament managers on this page, as well as the information spreadsheet, on the Sunday before the matches take place.
5. Use of the Visual Settings to alter background dim or disable beatmap elements like storyboards and skins is allowed.

   • Custom skin elements must not be used to alter core gameplay elements or mechanics in unintended ways.
6. If either player is not present at match time, the match can be postponed for up to 10 minutes. If after this period either player is not present, a win by default will be declared for the other player. If neither player is present, the match will be nullified and the player who was slated to play against the winner of this match will receive one bye.
7. Players may ask for a rematch if they encounter technical issues while playing within 30 seconds or 25% of the beatmap drain length (whichever happens first) of the game's start. Referees may, at their discretion, veto this request.

   • "Lag spikes" are not considered a valid reason to rematch a beatmap.
   • This rule is not to be abused. Referees may veto a rematch request if they find that this is the case.
8. If a player disconnects mid-game, their score will not be counted towards their cumulative, unless adequate proof of said score is provided. The following are considered as acceptable proof:

   • Player point-of-view live stream snippets (commonly referred to as "clips" or "VODs"). The entirety of the play, along with the results screen must be clearly visible along with the affected player's score.
   • Replay files of the play, taken directly from the "Local scores" tab on the affected player's client (the timestamps must exactly match the time at which the game took place, as seen on the multiplayer lobby link).
   • Player scores may be derived from the official stream as a last resort, in cases where the match is streamed.
9. Players are expected to keep the match running fluently and without delays. Excessive match delays from the players' side may result in penalties being applied by the tournament managers. Disrupting the match by foul play, insulting or provoking other players or staff, delaying the match, and other deliberate inappropriate misbehaviour are strictly prohibited, and will be punished accordingly.
10. Any attempts to manipulate bracket outcomes or future matchups may result in the immediate disqualification of the player from the competition. Examples of manipulative behavior include, but are not limited to:

    • Deliberately playing poorly to lose a game or match.
    • Colluding with other players to force a desired matchup.
    • Forfeiting bracket matches without providing an adequate reasoning, or with the intention of getting a more favourable matchup.
11. All players and staff must be treated with respect. Instructions from the referees and the tournament managers are to be followed. Decisions labelled as final are not to be objected.
12. The multiplayer chatrooms underlie the osu! community rules. All chat rules apply to the multiplayer chatrooms where the matches will take place.

    • Breaking the chat rules may result in a silence. Silenced players cannot participate in multiplayer matches for the duration of the punishment and, as a result, can have their match forfeited.
13. Penalties for violating the tournament rules include, but are not limited to:

    • Removal of pick rights for a game or match.
    • Point deductions.
    • Declaring the match as forfeited, or as a win by default for the other player.
    • Disqualification from the entire tournament.
    • Disqualification from the current and future official tournaments, until appealed.
14. Referees may allow, at their discretion, lower or higher tolerances for timers.
15. The tournament managers may request liveplays or recordings of individual players at any point in the tournament without prior warning.
16. The tournament managers will be responsible for receiving and investigating any tournament-related complaints.
17. The tournament managers reserve the right to modify these rules at any moment. Any such changes will be announced in advance.

Tournament registration

1. Every user interested in playing will be be required to sign up by playing in the official Qualifier playlist. Completing every map of the playlist is required to be considered for seeding.
2. To ensure valid registrations, every qualifying participant will be manually checked by the account support team, in a manner similar to the tournament screening that is offered to community tournaments. To be successfully accepted on the tournament, players are required to not have violated the osu! community rules within the last 12 months.
3. Participants will be briefed on further steps via an announcement message on the website.
4. Tournament staff members are not allowed to play in the tournament, with the exception of commentators, statisticians, and streamers.

   • The tournament managers must ensure that such staff members do not have access to priviledged information, e.g. Qualifiers score information, mappool information before the mappool showcase, etc. They are to be treated as regular players whenever possible.

Qualifier information

1. In the Qualifier stage, all players will play a specific pool designed by the mappool selectors.
2. The mappool will contain 5 brackets: No Mod, Hidden, Hard Rock, Double Time, and Lazer Mod.
3. The Qualifier pool will feature 12 beatmaps, organised as such:

   • No Mod: 4 beatmaps
   • Hidden: 2 beatmaps
   • Hard Rock: 2 beatmaps
   • Double Time: 3 beatmaps
   • Lazer Mod: 1 beatmap
4. Players will participate in an osu!(lazer) playlist lobby, which can be completed anywhere from Sunday, May 4 19:00 UTC to Sunday, May 11 19:00 UTC.

   • The playlist to be played is titled Lazer Grand Arena 2025 - Qualifiers, hosted by LeoFLT.
   • Notice: the playlist closes on May 11, 19:00 UTC, at which point no new scores will be allowed. No exceptions will be made.
5. Players will have 18 tries to use across the 12 playlist entries, with no restrictions on the order of play or amount of tries per individual item.

   • To be eligible for seeding, every player must submit at least one score for every beatmap listed.
6. Only the player's best attempt (i.e. highest score) will be used for every beatmap listed.
7. The lowest score across the 12 beatmaps will be removed from each player's seeding calculations.
8. The seeding method used for Qualifiers will be %MAX — the highest score for each map will receive 100% of the points, and every other player will be awarded a percentage of that top score. The exact formula that will be used for all players (and for each map) is Final Score = Player Score / MAX Score, where:

   • Final Score is the percentage awarded to the current player
   • Player Score is the score the current player achieved on the current map
   • MAX Score is the highest score achieved for the current map
9. The top 32 seeded players will advance to the bracket stage.

Bracket stage information

1. Matches for this stage of the tournament will have players play maps in sets of two, with the cumulative score across both maps determining the winner of the set. The first player to score to 3 wins the match (best of 5). In the event of a 2-2 tie, the last set will also feature an osu! original (OG) pick, to be played after the regular set picks.
2. The osu! original pick is to be played under FreeMod conditions. The only mods allowed for this purpose are any combination of No Mod, Hidden, and Hard Rock.
3. The draft order will be composed of a ban/protect phase and a pick/play phase.
4. The ban/protect phase will start with the lower seeded player banning one map, followed by the higher seeded player banning one map. Afterwards, the lower seeded player will protect one map, followed by the higher seeded player protecting one map. Lastly, the lower seeded player will once again ban a map, followed by the higher seeded player banning a final map.

   • Protected maps may only be picked by the player who protected them, and may not be banned.
5. After the ban/protect phase, players will take turns picking maps from the available pool, following the ABBA order, starting with the higher seedeed player.
6. The bracket stage will have two phases (one per weekend):

   • For the first weekend, a single-elimination bracket will be played from the Round of 32 up until the Quarterfinals.
   • For the second weekend, a double-elimination bracket will be played, from Quarterfinals up until the Grand Finals.
7. All matches for each weekend will utilise the same mappool.

   • Each pool will feature 15 maps, organised as such:

     • No Mod: 4 beatmaps
     • Hidden: 3 beatmaps
     • Hard Rock: 3 beatmaps
     • Double Time: 3 beatmaps
     • Lazer Mod: 1 beatmap
     • Original: 1 beatmap

Win conditions

• In the Qualifiers, players need to place in the top 32 in order to advance to the single-elimination bracket stage.

  • Seeding for this stage will follow the %MAX format — the highest score for each map will receive 100% of the points (i.e. 1 point), and every other player will be awarded a percentage of that top score. The sum of the highest score for every map will be used as the final seeding, with a higher point sum meaning higher placement (i.e. sorted in descending order).

    • The exact formula that will be used for all players (and for each map) is Final Score = Player Map Score / MAX Score, where:

      • Final Score is the numerical value awarded to the current player for each map.
      • Player Map Score is the score the player being evaluated achieved on the current map, taking the best score out of two.
      • MAX Score is the highest score achieved for the current map across all players and all runs.
• For the bracket stage, maps will be played in sets of two, and the player with the highest cumulative score for each set wins a point. The first player to win 3 sets wins the match (best of 5).

Match procedures

1. A referee will create a multiplayer room 10 minutes before the scheduled match time. Players must join the lobby in that period.

   • The room settings are Ruleset: "osu!" and Game type: "Team Vs". The room name must follow the pattern of LGA2025: ({High seed}) VS ({Low seed}). The player mentioned first in the room name must be the High seed, and the player mentioned second in the room name must be the Low seed.
2. Each player will receive one "tactical timeout" of 2 minutes, to be used as extra time to ban, pick, or ready for a beatmap. The tactical timeout may not be called on the opposing player's pick or ban phase.
3. Players will be allowed 2 minutes for each pick/ban phase (as described on the bracket stage instructions section), and an additional 2 minutes to press the Ready button on their client before play commences. If a player takes more time than allotted for either action, the procedures adopted will be as follows:

   • For the first occurrence:

     • The player will receive a verbal warning from the referee; in addition, the referee may opt to forcefully use the player's tactical timeout to allow for the player to pick.
     • If the player does not pick a map within 15 seconds from when the timer expires, the referee will apply the procedure for subsequent occurrences listed below, i.e. a random pick will be used for a pick timer, and the match will be forcefully started for a ready timer.
   • On subsequent occurrences:

     • For a pick timer: a random map will be chosen from the mappool by rolling a random number, based on the amount of beatmaps that were neither picked nor banned.
     • For a ready timer: the referee will issue the start command on a 10-second countdown. In this scenario, if the referee starts the match and either player is not present in the lobby, their opponent will receive the point instead.
     • Repeat offenders may receive further sanctions from the tournament managers.

Scheduling information

1. Each stage (as described on the Tournament schedule table) will be held on a single weekend.
2. Qualifier lobbies are not scheduled. Instead, players must take part in an osu!(lazer) playlist, as detailed on the Qualifier information section.
3. All bracket stages will be held between Saturday 00:00 and Sunday 19:00 UTC.

   • Exceptions may be made where possible; please consult the tournament managers for more information.
4. Match scheduling will be handled by the tournament managers. Schedules will be released on the Sunday before the first matches of the stage. The tournament managers will try to create the schedule to respect the participants' time zones.
5. Reschedules will only be considered if both players agree to a time and communicate it to the tournament managers, before Friday 23:59 UTC of the week when the match is to take place if, and only if, the new match time is communicated 24h prior to the new match time.

   • Matches preferrably be scheduled to any time beyond Sunday, 19:00 UTC (preferably) or Sunday, 23:59 UTC (at a maximum), of the week they are to be played at.
   • Times earlier than Saturday, 0:00 UTC are allowed as needed.
   • Do not ask for a reschedule unless it is absolutely necessary. The tournament managers reserve the right to deny any rescheduling request.
   • Late reschedule requests will not be accepted under any circumstances.

Notes