Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Collusion Detection in Team-Based Multiplayer Games   In the context of competitive multiplayer games, collusion happens when two
or more teams decide to collaborate towards a common goal, with the intention
of gaining an unfair advantage from this cooperation. The task of identifying
colluders from the player population is however infeasible to game designers
due to the sheer size of the player population. In this paper, we propose a
system that detects colluding behaviors in team-based multiplayer games and
highlights the players that most likely exhibit colluding behaviors. The game
designers then proceed to analyze a smaller subset of players and decide what
action to take. For this reason, it is important and necessary to be extremely
careful with false positives when automating the detection. The proposed method
analyzes the players' social relationships paired with their in-game behavioral
patterns and, using tools from graph theory, infers a feature set that allows
us to detect and measure the degree of collusion exhibited by each pair of
players from opposing teams. We then automate the detection using Isolation
Forest, an unsupervised learning technique specialized in highlighting
outliers, and show the performance and efficiency of our approach on two real
datasets, each with over 170,000 unique players and over 100,000 different
matches.

21
The categories of this paper are: adap-org
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th